Numbness, Strange Pain. Him!

He masturbates quite often and has been doing since he was very small, one day around end of January he masturbated and since then he is feeling strange pain and numbness in nerves he visited a sexologist and did some tests like Penile colour doppler study, Scrotal Sonography and whole abdomen sonography and all were normal and also Blood and Urine reports were normal but still he gave him a month of medicine likeCozim LC, Cozim L, Tadacip 20, Clotrimazole cream, 4u-q10 and Teramin and he surely did not tell him what is wrong with him, he is to scared to even touch down there and says it feels weird and hurt can someone please tell me what is wrong with him because he is very worried that doctor might have misdiagnosed him