I consider remission 1-3 solid stools a day with no blood or mucus. The BM urge can be held for a period of time without accident. Gas can be passed easily and discretely.
Loose stools, putrid gas and cramping, frequent urges or BM's lasting more than 2-3 days is mini-flare that can go away or go into full flare. Little mucus but no blood. Gas is "iffy" to pass and usually done in the safety of a restroom.
Full flare is urgent BM's often, blood mixed with mucus and undigested foodstuffs in very loose stools or D. BM's can range from 5-30 per day. Any BM urge or gas must almost immediately be performed in a hasty manner... bathroom or not.
That's just my take on flares. Also, I would listen to your GI doc if you trust him.
Diagnosed w/ Ulcerative Colitis in 1995
32 years old
Living med free
Currently in remission