Do you think i can go tanning with an ostomy bag?

Yes.: People with ostomies can do almost anything that people without them can do. I would keep the stoma covered while tanning. I would not usually advise tanning for tanning's sake, however. If we have learned nothing else, we have learned that excessive Sun exposure can be harmful in the long run. Exposure to ultraviolet rays alone, on tanning beds, can also be harmful. Ostomy or no, be careful.

Tanning: Don't do it. Tanning is a bad idea in general. Protect your skin by avoiding such activities.