White Patches On The Head Of The Penis

I am a 17 year old I'm young. Since the beginning of my penis for about 6 months, including one large and one small as two white-spotted yellow. There is a big one is in a little redness. This really scares me to think what could be? Is it something important? So far have not have sex. But why was such a thing, and really do not know please help I'm very afraid. Thank you in advance, God bless.

May be cancer. Make any definite conclusions difficult. Masturbation can also be due. But I think the mushrooms. Would not be right to comment without seeing. Show a skin doctor.