Below are the most important possible complications after sleeve gastrectomy.

Wound Infection

Minor infection of external surgical wounds may occur in approximately 3% of cases, and it is more common during the summer months.

Possible causes include:

• A portion of the stomach temporarily passing through the incision during surgery
• Thick layers of abdominal fat that may provide a favorable environment for bacteria
• Failure to follow postoperative antibiotic treatment
• Improper wound care at home

In most cases, wound infections are easily treated with antibiotics and proper wound care.

Gastric Leak

A gastric leak is a rare but important complication after sleeve gastrectomy.

It occurs when part of the stomach does not heal properly after surgery, allowing gastric fluid to leak into the abdominal cavity.

A leak test is routinely performed during surgery to ensure the integrity of the stomach. However, a small international incidence remains, typically less than 0.5%.

Leaks occurring shortly after surgery are often related to failure to follow the dietary instructions during the first postoperative month.

Late leaks, which may occur months after surgery, can be associated with:

• Use of painkillers (NSAIDs)
• Cortisone medications
• Weight-loss medications
• Smoking in all forms
• Excessive caffeine intake

Causes of Gastric Leak

• Failure to follow the prescribed diet during the first postoperative month
• Smoking (cigarettes, shisha, or electronic cigarettes)
• Cannabis use or tramadol abuse, which directly affect the stomach lining
• Previous abdominal operations may slightly increase the risk of leakage such as:
  • Gallbladder removal
  • Hernia repair
  • Abdominoplasty
  • Previous stomach surgery

At Shinkar Clinic, complication rates (including gastric leak) are among the lowest internationally due to adherence to international surgical standards, use of high quality stapling devices, and extensive experience with thousands of cases.

Bleeding

Bleeding may occur from the gastric staple line, which measures approximately 25-40 cm in length.

The international incidence is less than 0.5%.

Bleeding is more likely in patients with:

• High blood pressure
• Previous abdominal surgeries

In most cases, bleeding can be treated conservatively with medication. Surgical intervention could be required only in rare cases.

Gastroesophageal Reflux

Gastroesophageal reflux may occur in some patients after sleeve gastrectomy due to increased pressure inside the reduced stomach.

Symptoms may include:

• Heartburn
• Acid reflux
• Regurgitation of food

The risk can be reduced by:

• Eating smaller meals
• Chewing food thoroughly

Reflux is usually treated with acid-suppressing medications.

The risk of reflux is higher in:

• Smokers
• Patients with untreated Helicobacter pylori infection

Patients with pre-existing reflux symptoms should inform their surgeon before surgery, as sleeve gastrectomy may not always be the best option in such cases.

Vomiting

Vomiting may occur during the first few days after surgery, especially within the first 2-3 days, usually due to anesthesia medications or adaptation to the new stomach size.

Vomiting occurring 6-12 months after surgery may be associated with:

• Smoking
• Excessive use of painkillers
• High caffeine intake

Failure to Reach Ideal Weight or Weight Regain

Some patients may fail to reach their ideal weight or may experience weight regain after initial success.

This is usually due to:

• Failure to follow the recommended dietary program
• Excessive consumption of sweets and sugary foods

For patients with a strong preference for sweets, gastric bypass surgery may sometimes be a better option than sleeve gastrectomy.

Sagging Skin (Loose Skin)

Loose skin may occur due to rapid weight loss.

The best way to minimize skin laxity is through regular exercise, particularly resistance and weight-training exercises.

Patients are advised to begin exercising from the third week after surgery, with workouts 3-5 times per week.

Additional recommendations include:

• Consuming Whey Protein Isolate
• Maintaining adequate hydration
• Taking prescribed vitamin supplements

There are no creams or cosmetic treatments proven to prevent loose skin, and some patients with severe obesity may eventually require body contouring surgery.

Gallbladder and Kidney Stones

Rapid weight loss can lead to reduced gallbladder activity, increasing the risk of gallstone formation.

To prevent gallstones, patients are often prescribed Ursodeoxycholic Acid (Ursofalk) during the weight-loss phase.

Kidney stones may also develop due to:

• Insufficient fluid intake
• Calcium supplements that contain calcium carbonate instead of calcium citrate

Patients should drink adequate amounts of water and follow medical instructions carefully.

Blood Clots

Blood clots may occur due to:

• Limited physical activity
• Inadequate fluid intake

The risk is highest during the first month after bariatric surgery.

Clots may affect:

• The legs (deep vein thrombosis)
• The lungs (pulmonary embolism)
• The intestines

Preventive medications are routinely prescribed to reduce this risk.

Hiatal Hernia

A hiatal hernia may occur in approximately 1–5 cases per 1000 after sleeve gastrectomy.

This occurs when part of the stomach moves into the chest cavity.

It may cause:

• Severe reflux
• Persistent acidity
• Gastric twisting

Smoking significantly increases the risk, and treatment may sometimes require conversion to gastric bypass surgery.

Splenectomy

Splenectomy (removal of the spleen) is a very rare complication of bariatric surgery.

It may occur during or after surgery due to:

• Severe bleeding
• Gastric leak
• Abscess formation
• Dense adhesions

The estimated incidence is 1–5 cases per 1000.

Anesthesia Complications

Rare anesthesia complications may include:

• Allergic reactions
• Pneumothorax (air leakage around the lung)

These complications are uncommon.

Mortality Risk

The international mortality rate for bariatric surgery is approximately 1 in 1000 cases.

Death (although extremely rare) may occur during or after surgery due to surgical or anesthesia related complications.

Final Advice

Possible complications should not prevent patients from seeking treatment for morbid obesity.

The complications associated with severe obesity—including:

• Diabetes
• Hypertension
• Breathing problems
• Blood clots
• Stroke
• Sudden cardiac death
• Heart failure
• Depression
• Infertility
• Certain cancers

are more common and often more dangerous than the complications of bariatric surgery.

The main objectives of postoperative supplementation are to:

• Prevent vitamin and mineral deficiencies
• Preserve muscle mass during weight loss
• Maintain healthy skin, hair, and overall appearance
• Support bone strength and metabolic health

The following is the recommended supplement protocol after sleeve gastrectomy.

1. Multivitamin Supplement

A daily multivitamin provides the essential vitamins and trace elements required during the weight-loss phase.

This is the foundation of the supplement regimen after gastric sleeve surgery.

Recommended options

• Vitamax Plus
• Vitamount
• Vitayami
• Limitless Multivitamin

Dosage

One tablet once daily in the morning.

2. Calcium and Vitamin D

Calcium supplementation is important after sleeve gastrectomy to maintain bone density and skeletal health, especially in women.

The preferred form is Calcium Citrate, as it is better absorbed in patients with reduced stomach acid and do not cause renal stones.

Vitamin D is added to improve calcium absorption and prevent long-term bone complications.

Recommended options

• Osteocare
• Cal-Preg
• Any supplement containing Calcium Citrate with Vitamin D

Dosage

One tablet once daily in the evening.

3. Ursodeoxycholic Acid (Ursofalk)

Rapid weight loss after bariatric surgery increases the risk of gallstone formation.

To reduce this risk, many surgeons prescribe Ursodeoxycholic Acid during the active weight-loss phase.

This medication helps prevent gallstone formation while the body is losing weight quickly.

Medication

Ursofalk (Ursodeoxycholic Acid)

Typical dosage

1–2 tablets daily according to the treating physician’s instructions.

4. Vitamin B-Complex (B1, B6, B12)

B-vitamins are essential for nerve health, energy metabolism, and neurological function.

Vitamin B deficiencies may occur if dietary intake is insufficient during the early postoperative phase.

For this reason, B-complex supplementation is recommended after sleeve gastrectomy.

Oral supplements

• Milga Max
• Milga Advance
• Neuroton
• Neurobion

Dosage

One tablet twice daily.

Preferred option

In some patients, especially during the first six months after surgery, a weekly intramuscular B-complex injection may be recommended.

5. Whey Protein Isolate

Maintaining adequate protein intake is critical after bariatric surgery to prevent muscle loss and weakness.

Whey Protein Isolate is a highly purified protein source containing up to 90% protein and is easily absorbed.

It helps preserve lean muscle mass, metabolic rate, hair strength, and skin quality during rapid weight loss.

Daily protein requirement

Approximately 1 gram of protein per kilogram of body weight.

Example:

A patient weighing 100 kg requires approximately 100 grams of protein per day.

Protein intake can be divided throughout the day using protein shakes or high-protein foods.

Patients are encouraged to try different brands and flavors to find the most suitable option.

6. Iron and Folic Acid

Iron deficiency is one of the most common nutritional issues after bariatric surgery.

For this reason, iron supplementation is recommended according to the guidelines of the American Society for Metabolic and Bariatric Surgery (ASMBS).

Iron is particularly important for women of reproductive age, as iron deficiency anemia may develop if supplementation is neglected.

Recommended options

• Limitless Lipoferrex
• Haemotone
• Ferrotrone

Timing

Iron supplements are usually started between the third and ninth postoperative months, depending on laboratory results.

Dosage

Typically, 1–2 tablets daily, adjusted according to blood test results and medical follow-up.

Medical Follow-Up After Sleeve Gastrectomy

Regular follow-up is essential to monitor vitamin levels and ensure optimal recovery after bariatric surgery.

Patients are advised to undergo periodic blood tests to evaluate:

• Iron levels
• Vitamin B12
• Calcium
• Vitamin D
• Zinc and other trace elements

Supplement doses may be adjusted based on these results.

Stage One: The First Month Diet After Sleeve Gastrectomy

Week 1

Patients should consume clear liquids only, including:

• Packaged fruit juices (any flavor).
• Clear soups such as chicken broth or meat broth
• Warm herbal drinks such as: Anise, Mint, Linden, Cinnamon, Caraway and Clove

Sugar may be added according to preference.

On days 6 and 7, the following may be added: Milk pudding, Jelly and/or Lentil soup

Liquids should remain the main component of the diet.

Week 2

Food should be mashed thoroughly using a fork, then eaten slowly in small quantities.

Use a small teaspoon and consume 3–5 teaspoons per meal, slowly and carefully.

Allowed foods include:

• Mashed potatoes
• Mashed zucchini
• Mashed sweet potatoes
• White cheese 
• Cottage cheese
• Boiled eggs (mashed)
• Fried eggs 

warm herbal drinks may continue.

Diet sweeteners may be used, up to two packets daily.

Week 3

The following foods may be introduced:

• Eggs
• White cheese
• Cooked or raw green vegetables such as: Zucchini, Okra, Peas, Spinach and Green beans

Warm liquids may still be consumed. Small amounts of oil or butter are allowed, but deep-fried foods should be avoided.

Week 4

Proteins are gradually introduced, including:

Meat, Poultry, Fish, Shrimp, Tuna, Minced, meat, and Chicken liver

You should begin with very small quantities, chew thoroughly, and avoid extremely hot foods.

Important Warnings During the First Month

Failure to follow the first-month diet plan may lead to serious complications.

During the first month patients must avoid:

• Smoking
• NSAIDs
• Alcohol

Patients should follow the diet instructions exactly.

The stomach staple line is still healing and can only tolerate the foods listed above.

Consuming carbohydrates such as bread, rice, pasta, or beans during the first two months may lead to dangerous complications.

Patients should drink 12–15 cups of fluids daily during the first year to prevent: Dehydration, Dizziness, Headache, and Blood clots

Urine color should remain light and clear, indicating proper hydration.

Stage Two: Weight Loss Diet After Sleeve Gastrectomy

This phase usually lasts 4–8 months after surgery.

Two dietary approaches may be followed depending on the patient’s metabolism and lifestyle.

Your surgeon will help determine which approach is most suitable during follow-up visits.

Option One: Strict Post-Sleeve Diet (80–100% Excess Weight Loss)

Relying on surgery alone is not enough to achieve an ideal weight.
Long-term success requires changing eating habits and following a healthy diet.

This diet is particularly recommended for:

• Women
• Older patients
• Patients with hypothyroidism
• Individuals with slower metabolism

Diet Characteristics

The diet should be High protein, Moderate fat, and Low carbohydrates

This approach typically results in 80–100% excess weight loss within 8–12 months.

These recommendations are based on guidelines from the American Society for Metabolic and Bariatric Surgery (ASMBS).

Foods to Avoid:

Rice, Pasta, Bread, Potatoes, Sweet potatoes, Lentils, Beans, Biscuits, fruits and fruit juices, Oats, Corn, Soy, Chia seeds, soft drinks and soda, desserts, Milk, Processed cheese, Peanuts, Almonds, Pistachios, Cashews, Sunflower seeds, Mayonnaise, Ketchup, Mustard, and Garlic sauce

Processed meat should also be avoided, including Sausages and Burgers.

These often contain soy, starch, and fillers that slow weight loss.

Allowed Foods

Protein Sources: Meat, Chicken, Fish, seafood, Tuna, Shrimp, Squid, Eggs …etc.

Ground meat, steak, and tender cuts are recommended because they are easier to swallow.

Boiled eggs may also be eaten as snacks between meals.

Vegetables: Any cooked vegetables are allowed, including:

Molokhia, Zucchini, Green beans, Okra, Peas, AND Spinach

Vegetables may be cooked normally using oil or butter.

Leafy vegetables are encouraged such as:

Arugula, Parsley, Celery, Dill, Green pepper, Broccoli

Eating one bunch of arugulas daily is recommended to help prevent constipation and provide essential minerals.

Meal Guidelines

There is no fixed quantity of food.

Patients should:

• Eating when hungry
• Stop immediately when full
• Chew food thoroughly

Example Daily Plan

Breakfast / Dinner

• Boiled or fried eggs
• White cheese
• Arugula or green pepper

Lunch

• Meat, chicken, or fish
• Cooked vegetables such as zucchini, spinach, molokhia, green beans, or okra

Snacks

• Eggs
• Tuna
• Meatballs
• Whey protein
• Mushrooms
• Green pepper with white cheese
• Herbal drinks with diet sweetener

Macronutrient Distribution

Daily intake should consist of approximately:

• 70% protein
• 20% fat
• 10% carbohydrates

Total daily calories should remain around 700 calories per day.

Option Two: Moderate Post-Sleeve Diet (40–60% Excess Weight Loss)

This diet is more suitable for:

• Men
• Patients with muscle mass above 35%

However, this approach usually results in a maximum weight loss of 60% of the excess weight loss.

The risk of weight regain within five years may reach 30%.

Average Weight Loss

About 2–3 kg per month.

Diet Composition

• 35% protein
• 35% healthy fats
• 30% carbohydrates

Daily calorie intake should not exceed 800 calories.

Typical daily intake includes:

• 50 g protein (about 200 g meat)
• 50 g carbohydrates
• 10–20 g fat

Patients should eat protein first, followed by vegetables, and carbohydrates last.

Maximum daily carbs intake should not exceed:

Two slices of diet toast, ¼ loaf of traditional bread or 3 teaspoons of rice

Fruit may be eaten twice weekly, excluding high-calorie fruits such as:

Mango, Grapes, Figs, and Dates

Intermittent fasting 12–16 hours daily may also improve results.

This diet is not recommended for women, elderly patients, or those with thyroid disorders.

If weight loss stops or weight increases, the patient should return to the stricter diet plan.

Phase Three: Long-Term Lifestyle After Reaching the Ideal Weight

This stage begins once BMI is below 30.

The goal is to maintain weight loss and prevent regain.

Guidelines include:

• Carbohydrates are allowed up to twice daily
• Prefer only one carbohydrate type per meal
• Fruit and milk allowed twice weekly
• Nuts allowed occasionally during holidays or summer, no more than once every 2–3 months

The following should be avoided permanently:

White bread, Oats, Popcorn, Soda, and Carbonated drinks

These foods may contribute to gastric sleeve dilation.

desserts may be consumed once monthly.

Protein and vegetables may be eaten freely.

Sugar and honey should be avoided.
Diet sweeteners may be used up to two packets daily.

Banded Sleeve Gastrectomy

A silicone ring is placed around the stomach, with the objective of preventing gastric sleeve dilatation. It is still generally considered a research material without consensus about proven positive impact on the gastric sleeve results.

One of the main drawbacks of the silicon ring is that it does not prevent proximal gastric dilatation and may not prevent weight recurrence as a result of sweets.

On the long term, the silicon ring may cause gastric erosions, ulcers and/or perforations. It can also make any future stomach surgery much more difficult.

The presence of the silicon ring changes the operation of gastric sleeve from a simple physiological operation into an operation that involves a foreign body, which could introduce long term risks.

Keyhole Sleeve Gastrectomy with Nanotechnology 

Using advanced ultrathin laparoscopic instruments to minimize visible scars to almost none.

Usually, this technique is combined with bikini line technique to reach maximal aesthetic results.

Laparoscopic Reinforced Sleeve Gastrectomy

Oversewing sutures are used to reinforce the staple line in sleeve gastrectomy. This technique is widely thought to minimize possible postoperative complications like leak or bleeding and is now adopted as a routine step in most sleeve gastrectomy operations worldwide.

How does sleeve gastrectomy help Obese patients to lose weight?

• Restriction

Because the stomach is significantly smaller and its capacity was drastically reduced, limiting food intake and reducing hunger and the patients feel full after consumption of small portions of food.

• Hormonal Effect

The upper part of stomach (fundus) that produce the hunger hormone (Ghrelin) is removed, this leads to reduced appetite and better adherence to healthy food choices.

Gastric sleeve also increase hormonal levels of GLP-1 and GLP-2 which are known for improving satiety, insulin sensitivity and metabolic rate.

What Do the Incisions Look Like After Sleeve Gastrectomy?

The procedure is performed using minimally invasive laparoscopic techniques. Usually there are 3-5 small incisions at the abdominal wall, measuring about 0.5-1.5 cm. 

The incisions are closed using cosmetic surgical techniques. Therefore, they are thin, pale and small. Over time, scars gradually fade and, in most cases, become barely noticeable.

Pain After Sleeve Gastrectomy

Mild pain is expected after laparoscopic sleeve gastrectomy, especially during the first few days following surgery.

At our center, we use a device called Patient controlled analgesia pump, which is a small plastic device filled with strong pain killers and infuse them in a predefined dose for effective pain management. Therefore, most patients do not feel significant pain and by the third day pain would completely subside.

How Long Does Recovery Take After Sleeve Gastrectomy?

The recovery period at home after laparoscopic sleeve gastrectomy typically ranges from 1 to 3 days.

After the first few days, most of our patients are able to resume normal daily activities such as household duties, grocery shopping, walking, and moving comfortably.

International travel is generally possible 3-5 days after the operation. Returning to work is usually recommended after 5–7 days of the operation.

Estimated Cost of Sleeve Gastrectomy (2026)?

The cost of laparoscopic sleeve gastrectomy generally ranges roughly from EGP 40,000 to EGP 90,000 (1000-2000 USD) depending on surgeon experience, hospital level, and included services like hospital stay, tests, and follow-ups.