Pea sized lump in armpit. how do i remove this?

Surgical excision: Most small lumps in the armpit, particularly if superficial, are sebaceous cysts due to a damaged hair follicle. Unless they become large and bothersome, most sebaceous cysts can be left alone. The most important thing is to have the lump examined by a qualified health care professional to make sure that it is indeed most likely a sebaceous cyst and not something of more concern.