I get boils on my body quite often. 2-3 times an year i visit my doc .he diagnosis it as an abscess and prescribes antibiotics. i don't want to take unnecessary antibiotics. when should i visit a doctor for it and when is antibiotic use necessary?

Basics: Boils are a common lay term for an abscess before it forms completely. Once it completes, the simple treatment is surgical drainage. If your abscess is not mature enough that drainage would work antibiotics are a reasonable alternative. You never become resistant to antibiotics but some germs do. Bathing once a week in a tub with a cup of bleach in the water has helped some avoid recurrent boils.