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Have you got your wisdom teeth erupted or is it still impacted?
Usually,pepper or metallic taste
in back of mouth associated with p e r i c or o n i tis of impacted wisdom tooth
which is in flam med.
I would advice you to get a thorough clinical check up by a dentist
Tooth has to be either extracted or flap overlying tooth has to be removed to enhance tooth eruption
Complete course of am o x y c i lli n as well as analgesics has to be administered.