I am no gp, but I know of a few things that can cause this prob,
You may had had a reaction to something you have eating or are eating, it could be the meds or some food or drink, a mild reaction.
It maybe prickly heat, I get this alot in hot weather.
Allso anxiety can cause some symptoms like this, due to the nervous symstem. The nervous system is a very complex network of electrically charged nerves which are found in every square centimeter of your body, around every organ, muscle and across your skin, the largest organ in the body. Abnormal nerve impulses due to anxiety can cause a vast array of strange sensations; although quite harmless these can be very disturbing.
Hun if this is really bothering you, please pop along to your gp, peace of mind goes along way.
You take care, let us know how things go.
Hope it easers off soon.