Lack of sensation in penis head i have been to urologist he said nothing is wrong.still i feel no pleasure while rubbing my glans it was fine before.

Riding bikes?: You may have a pudendal neuropathy. This is caused by prolonged bike riding. Siting on a bike saddle for a long time places pressure against the pudendal nerve which can reduce sensation in the glans penis. If you ride bikes, use a softer seat or stop all together. You may also try using over the counter magnesium oxide 250 mg taken at bed. This may help in about 4-6 weeks. Good luck.