i have problem with my penis skin
It sounds like the circumcision was done tightly. Since it was done at age 13, your penis probably wasn't done growing yet. When your penis grew bigger, the skin got tighter and thinned out. This is just a guess based on what you're describing. There is nothing unusual about seeing veins on the penis - it is quite natural. What is unnatural, however, is the taught skin. The foreskin exists for a reason, to provide plenty of "play" in the shaft skin during masturbation and intercourse. The dryness is also due to the loss of the inner foreskin, a specialized mucous membrane, which can no longer provide natural lubrication to your penis. It sounds like your penile shaft skin is stretched to its limit. You can try gentle stretching techniques to grow more skin, which may also make it more "attractive" to you by partially concealing the veins. You can "restore" just enough skin to increase mobility, or go all the way and get an approximation of your natural foreskin back. Visit this site:
http://www.norm.org/devices.html
also, i know i dont have an std because i havnt had sex before.