Hello,
Such kind of bump can be a sebaceous cyst. Generally no treatment is required for sebaceous cysts but if they become painful then it means they are infected,Then surgical excision by traditional wide excision, minimal excision, and punch biopsy excision may be required.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
you need to see a dermatologist who can determine what it is :)