It can be a sebaceous cyst
. A sebaceous cyst
may occur anywhere on
body but scalp, ears, back, face, and upper arm, are common
sites for sebaceous cysts. Blocked sebaceous glands, swollen hair follicles and excessive testosteron
will cause such cysts.
Generally no treatment is required but they become painful
then it means they are infected, then surgical excision
al wide excision
, minimal excision
, and punch biopsy excision
may be required. Hope it helps.