Take a week off from running to rest your muscles. Then reduce your running and go slower. Do stretches for your quads, hips, and knees. Here are the ones I do. Be sure you run heavy/light, i.e. follow each run with a light w
Treatment may be dependant on cause. If this rash is in the groin (the folds of the skin) it may be due to costant wetness. In that case use powder and hydrocortisone. If it is down on the dry areas of skin, use lubricants an
Two possibilities come to mind immediately, either an infection of a hair follicle (especially common if you shave in that area) known as folliculitis, or a swollen lymph node (or gland) representing (sexually transmitted) in
. However, you mentioned there is also pain, and if the two symptoms are related, you might have an injury that is putting..., which is a long muscle on the outside of their leg that runs from their hip down the side of their leg...