Are there any vitamins, herbs, natural supplements for flare ups?

I'm 24 years old. I was diagnosed with a mild case of colitis in middle school. My stress and anxiety levels have been through the roof lately and I have my first flare up in a very long time. Gas, bloat, blood, mucus, and pain is what I'm have. I have to make frequent trips to the bathroom only to have gas that has ( sorry for the mental imaging) blood and diarrhea juice.

I'm prescribed Canasa (mesalamine 1000mg) suppositories at night time.

Are there any vitamins, herbs, teas, natural supplements that work good to help smooth flare ups or prevent them?

First of all you may need something more comprehensive than Canasa suppositories. There are many UCers here who take a milder maintenance drug such as Lialda or Asacol and remain in remission with rectal meds as needed. You will find that almost everyone recommends mesalamine enemas which are much more effective than Canasa.

Our signatures indicate that other really popular supplements for most of us are vitamin D, fish oil, PROBIOTICS, and a soluble fiber such as psyllium or Citrucel. Get your blood levels of vitamin D checked. While you are at it check your B12, folate, and iron since you might have been losing blood during your flare.

And as Juststud said there are quite a few threads here where people have said that curcumin dampens down inflammation:
https://www.healingwell.com/community/default.aspx?f=38&m=3515655

IMO everyone should keep a food diary. Two very common food triggers are gluten and dairy. I suggest avoiding gluten for 2-3 weeks to see if your symptoms lessen. Then try the same for dairy.

Everyone has their own path. You can check out our signatures for ideas that may help in your situation.

I use qing dai when I see mucus. I'm currently in remission though.