Hi, I am a 21 year old hispanic and in a few months I noticed a small white mark like an 1/4 of an inch on my penis head crown. It doesn't hurt, smell, bleed, or have pus; is just there and I'm very scare it might be something else. I went to the Dr. on September 2008 and he told me it might have been a stretch mark since I'm not circumcise. Then I went online to try to find something similar and the closest thing I found was something call smegma, but still is not a crust is just something white kind of a scar. I went to another site of doctors online but they only told me that they didn't know either what it was. I already got checked for HIV and other diseases and since I got my test, I haven't got any calls and its been already 4 weeks so since they told me that they don't call unless I have something bad, I'm assuming I don't. Please I really need your help because I don't know if i might have cancer of something.