It can be due to golfer’s vasculitis rash
which is a <span style = 'background-color: #dae8f4'>red</span> rash on
the calves of many walkers. It often starts above the sock line and makes red
patches and splotches up the calf. In that case, taking bath with cold water after
staying in the sun or applying cold wet towels may help.
If your legs
are itchy during or after
exercise, with no relation
to heat, you may have exercise urticaria. In such cases, antihistaminics and not exercising on
warm or humid days may help.