My wife is 23 years old, and for the past year, probably about 75% of the time she has had bright red blood in her stool. In the past 2 months, it has been getting worse, and she is passing roughly an ounce of blood now. She has already been to the doctor, and had a colonoscopy and a barium enema, and nothing was found. Hemroids, cancer, IBD, ulcers, and a number of other possibilities have already been ruled out.

She has had no pain at all. However, these last couple months she has been nautious and bloated when she first lays down to go to sleep. I did forget to mention she has something I think was called an acute colon (sharp bend somewhere in here colon), but according to the doctor, was not behind her bleeding. The closest thing I have been able to find to her symptoms, at least those not ruled out, is Diverticular Bleeding, which I am having a hard time finding details about.

If anyone has any ideas on what this could be, your information would be very much appreciated. Thanks in advance.