Welcome to HCM.
Thanks for you posting question.
You have not mentioned how long you are having these bumps and is it painful or not.
If it is painless and a longer duration then the possibility is sebaceous cysts. It is a harmless condition and certain individuals tend to develop the same. Nothing will happen if it is left alone except the increase in size during months and rarely go for infection. If you are worrying much about the same then it has to be removed by surgery.
If it is of shorter duration and painful and also present similar lesions in axilla
, then you can think of the possibilities as hair folliculitis
). It can be cured by a course of antibiotics.
You better meet a dermatologist
nearby and he/she will examine and direct you correct treatment.
Get well soon.