Sorry about your father-in-law having a brain tumor. My ex had to get a brain tumor removed several years ago. After the surgery, he said he felt like he was swimming in water. He talked like it too. Although he was able to return to work soon afterwards, it took him a couple of years to fully recover. I think the only permanent damage he had was to his spelling. But he never really was a good speller anyway.
You could be bleeding from hemorrhoids or a fissure or a low-grade flare. You should get it checked out.
If you have no other symptoms of Colitis--no urgency, no diarrhea, no bleeding, ..., then chances are that it's just hemorrhoids or a fissure. A sign that it could be hemorrhoids is pain at or near the assh*le right when and/or after going. I don't know much about fissures, but I heard that they usually hurt.
You should still get it checked out instead of trying to second guess though. Hemorrhoids, fissures, and Colitis are all treated differently.
Joy - 47 yrs and counting
Diagnosed w/ UC Dec 06 (also have IBS)
Currently in remission
Don't expect your doctor to cure your health problems. Your health is your responsibility.
Lexapro (for stress), Probiotics and Vitamins (a whole bunch of them)
Avoid HFCS, foods high in fructose, artificial sweeteners
When flaring: eat anti-inflammatory foods, avoid pro-inflammatory foods
Previous treatments: Fecal transplantation (worked), Prednisone (stopped working), Colazal (stopped working), Asacol (stopped working)