Get an xray done immediately

It seems you have a chronic condition Taking antibiotics is not the permanent solution, it might subside for some times and reappear again I would advise you to visit your dentist and get a proper clinical and radio graphical examination done and then only treatment plan will be decided whether it is tooth related or any other reason

Am a root canal specialist pertaining to ur concern, abscess comes due to reason: 1) due to decay( chronic) 2) fracture if not treated immediately If ur tooth looks alright in xray with just a decay without any other tissue damage(bone loss and mobility), pls u can go ahead with root canal treatment (RCT). RCT is to 1st completely clean the  infection from ur tooth, once we give the way for the pus from abscess to drain manually outside to the tooth, we seal it permanently by doing obturation next appointment without further leakage from infection. I also don't recommend u to have too much of tablets , because I will keep the antibiotic dressing inside your tooth on the cleaning day and the very next 2-3days boil/ abscess reduce in its size. Next appointment will be your filling day followed by crown capping.

If its more than a year its better to visit dentist and get checked. May be an antibioma due to excessive use of antibiotics r may be gingival abscess which can only resolved by treating underlying cause

Sir you need to have x ray for knowing the condition of infection Second you may require RCT /EXTRACTION depend on infection level What I can see it a crowned tooth if rct done then may require rerct /extraction as ur dentist suggest.