Gastric Sleeve Surgery: Understanding the Risks, Complications, and Side Effects

Bariatric Surgery
Originally Published:
January 6, 2021
Updated:
April 15, 2025
Read Time:
4 min
Gastric Sleeve Surgery: Understanding the Risks, Complications, and Side Effects

What Is Gastric Sleeve Surgery?

Gastric sleeve surgery, also known as sleeve gastrectomy, is a popular weight loss procedure that involves removing about 80% of the stomach. The remaining portion is shaped into a narrow tube or "sleeve," which limits the amount of food you can eat and helps you feel full more quickly.

This surgery is typically recommended for individuals who are 100 pounds or more over their ideal weight or have a BMI of 40 or higher, or 35+ with related health conditions.

While effective, it’s important to fully understand the risks and side effects before making your decision.

Risks of Gastric Sleeve Surgery

Like any major surgery, gastric sleeve surgery comes with risks. These may occur immediately after surgery or develop over time. Common risks include:

  • Excessive bleeding
  • Blood clots
  • Infection
  • Adverse reaction to anesthesia
  • Breathing difficulties
  • Leakage from the staple line (where the stomach was cut and sealed)

Long-Term Complications of Gastric Sleeve Surgery

Beyond the initial risks, patients should be aware of long-term complications such as:

  • Gastroesophageal reflux disease (GERD)
  • Nutritional deficiencies (e.g., vitamin B12, iron, calcium)
  • Chronic nausea or vomiting
  • Gastrointestinal obstruction or hernias
  • Hypoglycemia (low blood sugar)

These complications can often be managed with lifestyle adjustments, vitamin supplementation, and routine follow-ups.

Side Effects After Gastric Sleeve Surgery

In the months following surgery, patients often experience rapid weight loss—which can lead to temporary side effects, including:

  • Fatigue
  • Cold sensitivity
  • Dry skin
  • Hair thinning or hair loss
  • Mood changes or irritability
  • Muscle aches

Your diet will also be restricted to liquids and pureed foods for the first few weeks. Over time, you will transition back to soft and eventually regular foods. Vitamin supplementation is mandatory for life, including:

  • Daily multivitamins
  • Calcium supplements
  • Monthly B12 injections

Is Gastric Sleeve Surgery Right for You?

If you're struggling with obesity and traditional weight loss methods have failed, gastric sleeve surgery may be a lifesaving option. However, this decision requires careful consideration of the risks, recovery process, and lifelong lifestyle changes.

At BASS Medical Group's Bariatric Surgery Center, our board-certified surgeons have been performing weight loss procedures since 2002. We’re proud to maintain a complication rate significantly lower than the national average.

Take the First Step Toward Better Health

Contact our team to learn if gastric sleeve surgery is right for you. We’ll help you understand the risks, discuss your goals, and create a personalized weight loss plan that supports your long-term success.

Call 925-932-6330 or schedule a consultation online.

Medical Disclaimer: The information provided in this blog is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. BASS Medical Group does not endorse any specific tests, treatments, procedures, or opinions referenced in this content. Individual results may vary. Always consult with your physician or a qualified healthcare provider regarding any medical concerns or before making changes to your health regimen.