My husband and I are traveling and walking a lot. He has red, rash-like appearances on both of his legs, on the inside of the leg, starting from the ankle ending below the knee. It is worse on the left leg. It is warm to the touch and not painful. It is not swollen. When you press it, it turns white, but when you release it, it turns red again. This normally happens when we have been walking the entire day. It used to happen only in warm weather but this time it is happening in 50-60 degree weather. In the past, the red, rash-like appearance disappeared the next morning. This time it has continued to day two. What can be causing this?