I have these red spots that are temporary on my skin. they are temporary and don't last long . the only sexual contact i have ever had was a hand job ?

No STD, no worries: Apparently you are concerned about STD. No worries there. No STDs are transmitted by hand-genital contact, and no STD causes red spots that come and go like this. If the skin looks normal at other times, usually these are areas of increased capillaries in the skin, more visible with increased blood flow. If on penis, often most prominent with sexual arousal. But see MD if you remain concerned.