Hrllo there, Testicle pain has a number of possible causes. The testicles are very sensitive, and even a minor injury can cause testicle pain or discomfort. Testicle pain may arise from within the testicle itself or from the coiled tube and supporting tissue behind the testicle (epididymis)... And the lump could be due to varicocele...It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your Surgeon...