Don't know if I'm posting in the correct section but the problem is in my mouth. Every morning when I wake up, I have this Brown gunk that's in my mouth. It's on my tongue, the roof of my mouth, on my teeth and in the back of my throat. If I drool during the night, it leaves a brown patch on my pillow. It's gross! Now I've noticed that if I take an antibiotic for whatever given illness, the brown gunk is not nearly as bad or goes away for the most part. Once I finish the antibiotics, the brown gunk eventually comes back, so this leads me to believe that it's bacterial. I don't experience any fevers, sore throat, or anything like that. I feel fine tho I've had this problem for as long as I could remember. Nevertheless, I still don't know what it is, how i got or how to permanently get rid of it. Any help would be appreciate.