The single most useful thing I've learned about my ulcerative colitis isn't a treatment or a diet. It's how to tell, often days ahead, that a flare is on its way.
Before I say anything else, the important bit: these are my warning signs. Yours will almost certainly be different, because everyone's UC behaves differently - that's the whole point, and it's why I'll never hand you a checklist and tell you it's gospel. What I can do is show you what learning your own early signs actually looks like, using mine as the example. None of this is medical advice. If your gut is changing, your own team is who you talk to.
My earliest warning signs
For me it usually starts quietly, before any of the obvious stuff. The first thing is a bit of stomach cramping. Then I notice I'm making more and more trips to the toilet, and the urgency starts creeping back in - that feeling of needing to go now that takes over your day.
From there I might see slight streaks of blood. And around the same time my appetite starts to go, usually over a few days, and I start feeling generally a bit rubbish with it. None of these on their own is a five-alarm fire. But together, and in that order, they're my body telling me something's coming.
The order it tends to go in for me
Over the years I've noticed my flares follow a rough sequence rather than arriving all at once:
The cramps bring the extra toilet trips. The extra trips bring back the urgency. And then, further down the line, the blood can start again. Knowing that order is genuinely useful - when I feel the cramps and clock the trips creeping up, I already know what's likely next, so I don't wait around to have it confirmed in blood.
The mistake I made early on
In my first few flares after diagnosis, the signs were the same - more trips, the urgency - but I brushed them off. At first it's the same old story and part of you refuses to believe you could get that bad again. So you tell yourself it'll settle.
At first you brush it off, thinking you can't get that bad again. You can - and it can happen suddenly. Deal with it as early as you can.
It can come on far quicker than you expect. If there's one thing I'd lift out of this whole post, it's to deal with it as early as possible rather than hoping it passes. Early is easier. Late is a hospital bed.
How I tell a real warning from a false alarm
Not every change means a flare, and I've learned not to panic at the first odd trip to the toilet. When my movements change, the first thing I do is think: is there an obvious reason? Something I ate that I wouldn't normally, or a few drinks the night before?
Here's the honest, slightly annoying truth though - even a dodgy meal can tip some people into a flare, so "it was just something I ate" isn't always the get-out it sounds like. So I'm careful about the basics: I try to eat food that's been stored properly and is in date, which at least rules out the ordinary stuff. Then, if there's a possible explanation, I treat it like any other illness - give it a day or two and see if it shifts. If it doesn't settle, that's when it stops being a false alarm and needs dealing with.
What I do the moment I decide it's real
I'm fortunate now - I'm under the care of nurses every six weeks for my treatment, so I have people I can actually contact. When I flag an early flare, they can escalate it, get me seen a bit quicker, or have someone review my bloods to see whether I need more medication or to be seen more often. That direct line makes a huge difference to how fast things get caught.
If you don't have a contact like that, get to your GP - they should be able to help and point you towards the right person or referral. The key thing is not to sit on it in silence. Having someone to tell is half the battle.
Learning your own signs, not mine
So how do you build this for yourself? Pay attention, basically. Be aware of foods you add into your diet and notice how they make you feel afterwards. Plenty of people recommend a food diary for exactly this, and if that helps you spot patterns, do it - the point isn't a perfect logbook, it's noticing what your own body reacts to.
And here's something worth knowing: you might not be in a full flare and still have symptoms. You may still get more trips than you'd like, or a bit of urgency, even when things are broadly under control. That's why it pays to know what your normal looks like, so you can tell when it's genuinely drifting off course. Keep an eye on your movements. They're the clearest signal you've got.
If your movements change and you can't explain it
The simple rule I'd leave you with: any change to your movements with no obvious reason is worth watching. Give it a day or two like you would any illness. If it doesn't shift - or if you see blood, or that creeping urgency you recognise - contact your IBD team or nurse, and if you haven't got one, your GP. Catching it early genuinely changes how bad it gets. I've learned that the hard way so you don't have to.