The primary objective of this study is to confirm the long-term efficacy (remission and maintenance in remission) of current validated treatments. Each patient will be followed during 3 years in this non-interventional trial.

Inclusion Criteria:

• 18 years old or above
• Ulcerative colitis, whatever the extension, in mild to moderate flare-up (including proctitis)
• Having received the information sheet

Exclusion Criteria:

• Participating, at the time of inclusion, in another study using an investigational drug or device

All patients at least 18 years old suffering from mild to moderate active ulcerative colitis (whatever the extension)