Lately i've had a few red bumps appear on my legs and one on my arm . they are red with a white head and go away fast could it be herpes?

Folliculitis: The most common explanation for scattered self-limiting minute pustules is infected skin pores. An antibacterial soap, avoidance of scratching and scrupulously cleaned fingernails are useful to prevent skin infections.

Herpes simplex: The description you provide does not necessarily suggest herpetic infection, nor do the areas involved. The only way, however, to determine what these are is to have them examined by a physician. Go and see somebody and deal with these effectively. Good luck.