Pain in the right hand side of Penis

Patient: I have a persistant pain on the right hand side of my penis. There are no skin problems ( warts or sores) but i was told I have a lymphocele which is not dangerous and should go away by itslef. I have recently been diagnosed with prostatitis and had a nasty urine infection ( cleared up by antibiotics ) The penis pain has come back ( more of an ache ) and some days worse than others. It does seem to be related to sexual activity. My GP told me not to worry about it but I am concerned . Are lymphoceles painful or could it be something else?

Doctor: