Am getting large pimple like sores on my legs and buttocks. have had antibiotics but they keep reapearing. sores burst and excrete puss like substance?

Infect Dis specialis: Has the pus been cultured to make sure that the right abx had been used? Do you work with contaminated objects often? There is also a possibility that you may have an immune defect causing the recurrent boils. Consult an infectious disease specialist first and perhaps an immunologist later I assume that you bathe regularly and have reasonably good hygienes