<s>[INST] So, a few days ago I was masturbating and after I was done I looked down and saw a bump on the left side of my penis,its on the middle of the shaft, not near the head or near the base. It looks like its a bump under the skin because when i would move the skin around, it would move with it. It doesnt hurt to the touch but when i try to apply a little bit of pressure to it, it ll obviously cause a little pinch. It s not big at all, about 2/3 the size of a pea but im still concerned. It s hard but not like a rock, it s kind of hard to describe it. I researched a lot and I thought it was a lymphocele until recently and I think it might be a cyst, and I ve been going back and forth. It doesn t go away and come back as far as I know because it hasn t gone away yet. I haven t masturbated since I got it because I read that you shouldn t if you have a lymphocele because it ll irritate it. [/INST] HelloThanks for query. The lymphocyte is very rare to occur on shaft of the penis. The painless lump on the shaft of the penis is mostly a Sebaceous Cyst. The penile skin is rich in sebaceous glands and hence prone to get more sebaceous cyst due to accumulation of sebum beneath the skin. Normally they fade away without treatment however they need to be treated if increase in size or get infected. Please consult qualified General Surgeon for clinical evaluation and if feels it to get excised get it excised in Toto. This is a simple surgery done under local anesthesia as an out patient procedure and offers permanent cure. Chat Doctor.  </s>