I recently started having a bad nasty taste in my mouth.  It seems to be at the back of my tongue and kinda tastes like blood or a rotten tooth.  I have good dental health brush and floss twice a day and recently started brushing my tongue in hopes it would help.  My mouth stays dry a lot and I recently starting wearing a nicotine patch to stop smoking.  It feels grainy when I swallow.
Hello thanks for consulting at Chat Doctor.it could be an abscess - periodontal, since you are tasting blood,it also could be due to tonsils, either ways please consult a dentist followed by an ENT specialist,do salt water gargle three times daily, keep your oral hygiene good, Chat Doctor. .hope it helps.TC