Hi,
This could bedue to folliculitis or a boil.
Folliculitis is inb flammation of the hair follicle - it can occur during if hair get pulled out due to friction, tig/ht clothing etc. Try not to squeeze it.
Individuals who are predisposed to folliculitis should be extremely careful about personal hygiene. Application of antiseptic washes may help prevent recurrences. A topical antibiotic cream, mupirocin (Bactroban®), has been effective at reducing bacterial colonization in the nostrils. It is applied twice daily for a week and is repeated every 6 months.
Let us know if you need any other information and consult a skin specialist if the lesion is persistent.
Regards.
Bubble like a blister? If you have been playing around it might be herpes. If you have been yanking it might be friction.
Need more info otherwise