This is an infection of the hair follicle and this disease is similar to impetigo. Folliculitis is sometimes transmiitted by unsterilized or unclean hair-removing instruments. Tea tree is often helpful in the treatment of folliculitis.
Daily Hair Tip
Whenever possible limit or avoid using a brush on curly tresses. Instead use a widetooth pick or comb with "hair friendly" edges that won't rip or tear fragile curls.