diarrhea with bloody mucus and pian in anal

Iv'e had diarrhea for the past 4 days.  Two days ago I felt sore in my anal from going to the bathroom so much.  The next time that I went to the bathroom (diarrhea) it hurt. When I got up from the toilet, I noticed the water was light red. Then I checked the toilet paper after wiping. It had wet stool with a light color of red bloody mucus. since then every time I go diarrhea its stool with bloody mucus. What could be wrong with me? I thought that maybe it could be that I ate too much soy.   The day before I got diarrhea i ate a box of granola bars that contain soybeans. But now after see the blood mucus, I don't know what it is.  What do you think?

[Ratnakar ., MD]

Hi,
These could indicate colitis if you have abdominal cramping as well. A course of antibiotics would be helpful if it is due to infection.
If it persistent then colonoscopy may be done to rule out inflammatory bowel disease.

[aar1151]

I have had ulcerative colitus for 35 years.  My son also has it.  He gets the abdominal cramping but I never have.  You need to see a gastroenterologist as soon as you can.  Good luck.  aar1151