Does this happen when you also eat nuts too?
Allergy to peanuts would be to all forms of the peanut, not just peanut butter. It sounds like it is the undisgested part of food which happens with high fiber foods (peanuts). If you are concerned, see your MD.
Nope, this only happens when I eat peanut butter.
Oh yeah, I weigh about 175 lbs, 6'1, and 19 years old