8 Essential Things to Avoid Before Your Weight Loss Surgery Weight loss surgery is common in Singapore and is considered helpful for those suffering from health complications related to obesity, such as sleep apnea, arthritis, hypertension, and diabetes. If you are scheduled to undergo weight loss surgery, your doctor might advise some precautions prior to your procedure to ensure a smooth operation and recovery. This infographic also lists essential things to avoid before surgery, so make sure to save it for future reference.