Potential Problems following weight lose surgery



Potential Problems Following Weight Loss Surgery And Suggested Dietary Modifications

Nausea and Vomiting


  • If nausea and vomiting occur after eating a new food, wait several days before trying that food again.
  • It may be necessary to return to liquids or pureed foods temporarily.
  • Eating / drinking too fast may cause nausea or vomiting
  • Eating / drinking too much may cause nausea or vomiting.
  • Insufficient chewing may cause nausea or vomiting
  • Avoid cold beverages those with caffeine or carbonation
  • If nausea and vomiting persists, call your surgeon


Dumping syndrome – Abdominal fullness, nausea, weakness, warmth, rapid pulse, cold sweat, diarrhea


  • Avoid all sweetened foods and beverages
  • Avoid high fat, fried, greasy foods
  • Do not drink fluids with meals
  • Wait at least 30 minutes to drink beverages after meals.


Pain in shoulder or upper chest area (occurs when you eat too much or eat something hard to digest)


  • Stop eating if pain occurs during eating and try to eat later after pain has resolved.
  • If pain persists, call your surgeon.




  • Dehydration can occur with inadequate fluid intake, persistent nausea, vomiting or diarrhea. At least 6-8 cups of fluid a day are recommended.




  • Constipation may occur temporarily during the first postoperative month
  • This generally resolves with adaptation to changes in volume of food
  • Drink low-calorie fluids regularly – this will prevent constipation
  • You may need to add a stool softener or fiber supplement, speak with your dietician or surgeon about available products.




  • Limit higher fiber, greasy foods, milk and milk products
  • Avoid very hot or cold foods
  • Eat smaller meals
  • Sip fluids between meals
  • If diarrhea persists, call your surgeon.



  • Avoid carbonated beverages
  • Avoid citrus fruits and beverages such as lemonade, orange or pineapple juice. (You may resume citrus foods and beverages once on a regular diet, you do not have to avoid citrus after gastric banding).
  • Avoid caffeine
  • Do not use a straw.



  • Limit liquids to 2 oz at one time
  • Sip slowly


Taste/Sensory Changes

  • This may occur during the first few months after surgery but will resolve over time
  • Some foods may taste too sweet or have a metallic taste
  • Strong smells from cooking may affect you, try to avoid the kitchen while someone else is cooking


Blockage of the stoma (opening of the stomach)

  • The stoma may be temporarily blocked if foods with large particle size are eaten without thorough chewing
  • If symptoms of pain, nausea and vomiting persist, your surgeon should be contacted
  • Do not progress to solid foods until your surgeons tells you to.


Rupture of the staple line after gastric bypass

  • Rupture of the staple line is unlikely, however, avoid eating an excessive quantity of food at one time.


Stretching of the stomach pouch/stoma dilation

  • Avoiding large portions of food at one time can reduce the risk of stretching the stomach pouch.
  • The risk can be decreased by gradually increasing the texture of foods in the early postoperative weeks.
  • Follow the recommendations for advancing your diet to prevent this stretching.
  • Avoid carbonated beverages


Weight gain or no further weight loss

  • You might be eating high calorie food or beverages
  • Keep a record of all foods, beverages and snacks eaten to determine the exact reason for this.
  • Measure portion sizes
  • Avoid prolonged use of nutritional supplements such as Ensure, Boost etc.
  • Use only low calorie beverages in addition to fat free milk
  • If you had gastric banding, you may need your band adjusted
  • Lack of physical activity.