How can I tell if my rectal bleeding is from UC or internal hemorrhoids?

I was diagnosed with Ulcerative Proctitis a year ago after a Clostridium Difficile infection. On Lialda 4 tablets a day for the past year. Actually I felt so well that after 4 months of no symptoms whatsoever i stopped the Lialda
3 weeks ago after a round of antibiotics for a respiratory infections I started having stomach issues, diarrhea and upset stomach. After a few days with diarrhea and one night of stomach ache that didnt allow me to sleep I started to have bloody BM. I have continued to have diarrhea very mushy stools and blood intermitently, one day no blood for 3 days yes.
I have internal hemorrhoids, so I am wondering if this is a flare up of the UC of just bleeding from the internal hemmies. Is there a way to determine? I have rectal pain, and urgency.

Sounds like you're flaring again. But I'm curious, why did you stop your medication? UC and UP are a lifelong condition that requires constant treatment to avoid flare ups. And every time you stop a medication, sometimes it gets harder and harder to control the symptoms not to mention that it's possible it can spread.

The only way to tell whether it is a flare or a hemmeroid is to see a doctor. Hemmeroids are only a few inches in, a white glove and a finger can tell if it's a hemmeroid and a family doctor or a gastroenterologist can examine.

Whenever your symptoms get worse, you should contact your gasteroenterologist. He/she will give you a stool test kit to check for pathogenic causes to your worsen symptoms like cdiff (can be a consequence of antibiotics) .

Stopping your medications when you feel well isn't good. It's likely an ulcerative colitis flare as a result. Catch it early, seek treatment asap and you'll likely bounce back quickly. Certainty eliminate the possibility of hemmeroids and a pathogenic causes.

Sounds like we're getting off topic here. The OP is asking about rectal bleeding. I think it's good to remind the OP that taking medications is recommended with uc and that their are consequences for ceasing them, as there's multiple posters per month who have that exact result. Nobody denies that some use only natural approaches but I'd argue that only a minority are successful.