What can i do about an ulcer i develped after having gastric bypass ?

Proton pump: Inhibitors may be required...Talk to your physician.

Medication first : Start by eliminating any irritants such as tobacco, nsaids or alcohol. Typically ulcers at the anastomosis can be treated with medication such as a proton pump inhibitor(ie Prilosec or protonix) and carafate (sucralfate). 6-8 weeks of treatment should allow the ulcer to resolve. If not, may need to revise the anastomosis to improve blood flow or reduce tension or provide healthier tissue.