It is an exercise induced vasculitis and hiker’s rash, names given by different medical researchers to develop vasculitis leading in a purpuric rash i.e. bleeding from underlying tissues. It is frequently experienced in the lower legs caused by excessive exercise in higher temperatures.
Related journal of Golfers vasculitis
Journal of Vasculitis, Journal of Clinical & Experimental Dermatology Research , Journal of General Practice , Anatomy & Physiology: Current Research, Journal of Neurology & Neurophysiology, Australasian Journal of Dermatology, The medical journal of Australia