tooth abscess

i have had an abscess on my bottom left back tooth since nov.  I had a baby end of dec so back in nov not much could have been done.  I am now on my third lot of antibiotics that dont seem to be doing anything.  The dentist has tried on three occasions to drill the tooth but for some reason it wont numb - she gave me five different injections last time!  I am worried that i have been taking parcetomol  since nov and am sick of feeling so ill and being in pain day and night, what can i do.

[scottma]

Abscess in the oral cavity is almost invariably caused by infection. Identifacation and elimination of the infection source is the treatment of choice.Long-term antibiotic adminisration is not recommended.