For multiple boils on your back, start by applying warm compresses for 10-15 minutes several times a day to encourage natural drainage. Wash the area daily with an antiseptic cleanser containing chlorhexidine or benzoyl peroxide. For targeted topical treatment, a prescription-strength antibiotic ointment like mupirocin can be highly effective. Because you have multiple boils, it is best to consult a doctor. They may prescribe oral antibiotics, such as cephalexin, to treat the infection from the inside out and prevent it from spreading. Please avoid squeezing or popping the boils yourself.