I have this all of the time.
Mucus is problem with my IBS-D. It freaked me out at first, but it's almost like it's "normal" for me now. Sometimes, it's all I pass. Gross, I know, but true!
Sometimes the mucus is clear, sometimes, it is a light brown. (Gross, again.)
What causes mucus in IBS-D anyway?? Is it due to overactive colon motility? I always read that passing mucus is caused by inflammation, but I thought there was no inflammation with IBS-D. So...what causes mucus overproduction in IBS-D??
This board will help you deal with these questions. Everybody is so nice here.