This could be an infected hair follicle, and since its not going away, see your doctor.
Aj
how big can an ingrown hair bump get and when they go down will it leave a mark. i have this dime sized round dark mark on shaft of penis where the hair grows smooth feels like my skin i just notice it 2 weks ago,but about a 6months ago i had an ingrown hair down there,so could this be a infected hair follilcle are somethin else please help....