welcome to health care magic
Thanks for your query
Most common lump found in the body is lipoma
It is a benign tumor
of fat cells..
Regarding the swelling,most of the times it is soft,freely mobile,skin can be pinchable from the swelling,painless.non-tender..
Diagnosis can be conformed by FNAC(fine needle aspiration cytology).
Except for cosmetic purposes no treatment is necessary for that..
It can be removed by simple surgery by a surgeon,,with a local anesthesia
Hope you understand my suggestion