After 4 months of recurring boils i went into a topical antimicrobial treatment and healed for 7 month.now i got a new boil.what happened? thanks docs

First i would go : see the doctor who gave you the topical. If you didn't see a doctor then you need to make appointment with dermatologist. There are many reasons boils occur from hidradinitis, to infections, so make appointment and get on the right treatment for your skin condition. Hope that helps

New colony: Staph is common on skin and common cause. Antibacterial soap, thorough showers, and treat the current one with warm compresses, drainage. If more you may need nasal and skin treatment.

Take a shower a day: Everyone has bacteria on their skin and in sweat glands. Most of the time Staphylococcus aureus held in check by immune system.( If you are not diabetic,)organisms can increase in number for lots of reasons. One or two showers a day with any kind of soap decrease the number of bacteria on skin and decrease the infections. One or two doses of an injectable Stapphloccus vaccine (Merck) helpful.