There are many possible causes for this type of rash including viral diseases, allergies, insect bites and reactions to heat,sweating,cosmetics,chemicals or irritants.The distribution and duration of the rash is important.
A pimple like rash could be caused by a numberous of things. Heat could cause a rash on certain parts of your body. A yeast infection could cause a rash in certain areas.Poison Ivy or any type of poison could cause cause a pimple like rash that itches a whole lot. These are just a few answers.
Pimple like rash may be sometimes due to viral infection, which goes away by itself. These rashes are very itchy which makes person uncomfortable. it may be allergic also, & due to some eating products.
pimple like rash could be due to bacterial infection.wash your fce with cold water and pat dry.dont rub your face or nail them.apply antibacterial cream.
I would need to know more information about your question there is really not enough information to answer this question such as were is the pimple located.A rash can be caused from may different things such as an reaction to a medication or even a sexual transmitted disease a chemical reaction.I hope this helps.