hi ..thanks for your query.
The bump that you mention may be any kind of soft tissue
swelling ,some of the common one being sebaceous cysts/ neurofibromas/ lipomas
.These are benign growths and present over a period of time in the body .However ,a cyst ,for example may be infected and cause symptoms like tenderness/ swelling/ redness
Please undergo a complete evaluation for the growth with a dermatologist
.In case you want to remove it, there are simple procedures for the same.however the exact outcome of the surgery in terms of the scars
being left etc can be commented on only after seeing the size and other features of the growth.
Hope this helps..Take care!