Difficult to say without examination. If the lump is superficial, it can be a fatty tissue deposit (lipoma). This is normally benign and can be removed if it is causing discomfort.
A hernia or cyst are also possible.
You can consider a CT scan to confirm the diagnosis, or obtain a referral to a surgeon for further evaluation.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
http://www.straightfromthedoc.com
no pain or discomfort. hernia? or cyst perhaps?
is this urgent to see doctor or might it be something incidental and go away - can I wait a few days or week?
sincerely
Prashant