Colitis ulcerosa

The continent ileostomy or ileal pouch are contraindications to diving due to the inability of gas in these structures to escape the effects of pressure changes. There is considerable risk of rupture of the pouch during ascent due to gas expansion.

Diving itself does not affect Colitis ulcerosa one way or the other--just the effects of pressure on the complications of the disease and the alterations that medications cause in the ability of the body to ward off infection.