After masturbate my veins in left side enlarge and pain when i stand more pain when i lie down less pain and back to normal the veins are no longer large answer my question please?

You might have partial thrombosis of one of the penile veins. When you stands the venous return is harder due to gravity so the vein is engorged and tender. You probably masturbated excessively or too vigorously. You should abstain masturbation for a while. If condition gets worse, you should see a urologist.

Hard to understand your question. Do you mean your side or the side of the penis.? Veins on the side of the body are not related to masturbation. Veins on the side of penis enlarge due to more blood to the area on sexual excitation whenm masturbating and goes away when it stops. If this persists pl see your MD for without exam no Diag can be made