<s>[INST] I have had a small bump on the left side of my penis, it is under the skin and isn t really noticeable until u feel it, there is no pain that comes along with it, it is near the top on the shaft before the head I know that it has been there for probably at least 2-3 years. I am 18 [/INST] Hi.do you have any other signs or symptoms that comes along with it? It could be a cystic formation or any of the other benign lesions such as fibrous or lipoma. Infective causes must also be ruled-out. A consult with a doctor, preferably a urologist is best, for physical examination and clinical evaluation. Diagnostics and management (medical and/or surgical) will be directed accordingly. Hope this helps. Good day!!~ Chat Doctor.  </s>