Length of flares

Until you find the right treatment or combination of treatments, you flare indefinitely. Flares can last weeks, months, a year, and multiple/many years. We've had some users flaring for many years.

So, theres no specific "it's only safe for X number of days/weeks/months/years". Certainly flaring has a number of negative symptoms and a negative impact on our bodies. Ideally, you want to keep flares as short as possible, but often each new treatment might take a couple months to work and show results if it's going to. The reality is you might have to try several separate treatments over a number of months to find your solution.

Flares can cause uc to spread in extent and severity. Prolonged flares increase colorectal cancer risks compared to those in remission. Usually prednisone is used to take the worst out of the flare (take away the inflammation and symptoms), while new treatments are given time to work, and then you taper to see if it works.

I'd give a new treatment several months time. It's either going to work or not. You then move on to the next treatment.

I've had flares that lasted well over a year. Over the time, they were various in symptoms, ranging from mild to severe. of course, at a certain point, if it gets very severe, it's limiting on your life in many ways and I wouldn't recommend going on like that for very long. Usually at that point, I would end up resorting to a course of steroids to try to get back on track. Unfortunately in my situation (but not for the majority of UCers), nothing worked for me except steroids. I usually gave treatments a few months. I gave 6mp a very long time and had some success with it, but eventually it was obvious it had failed. You need to feel things out.