I exercise a lot and I’m generally very healthy (I’m a triathlete). But the other day I got an infected hair on my leg where my jogging pants were rubbing. I popped it, and since then this itchy red rash has been spreading around the popped zit. It’s been a couple of days now and it’s just getting bigger and redder. Can you tell me what’s going on? (Female, 32)

Folliculitis is a skin condition that occurs when hair follicles become infected.  Folliculitis can range in severity but even mild forms can be upsetting, embarrassing and uncomfortable. The infection initially start off as white headed pimples around the hair follicles. The majority of cases of folliculitis are superficial and only itch. Anyone can develop folliculitis but certain risk factors make some people more susceptible. 

Folliculitis may be due to exposure to hot water (prolonged hot tub use), excessive use of topical corticosteroid therapy, trauma to the skin from tight and restrictive clothing, obesity or having acne. Mild cases of folliculitis usually do not cause complications but severe cases can develop into skin infections, which can eventually pass into the blood stream.  All cases of folliculitis that do not resolve or are associated with more redness need to be seen by a doctor.

The diagnosis of folliculitis is based on a physical exam and sometimes your doctor may take samples from the pustules to send to the lab. Mild cases of folliculitis usually resolve on their own with warm compresses but severe cases of folliculitis need treatment. Your doctor may start you on topical or oral antibiotics and recommend that you avoid shaving the area until the infection is healed. Moreover, if you must shave, use a clean razor blade each time. 

While at home, apply a warm moist cloth to the area several times day, gently wash the skin area at least twice a day and do not share your personal care products with anyone. In your case, it is important to see a doctor to make sure that you do not have an infection that requires antibiotic treatment. Hope this advice helps.