I have the same situation, which has been bothering me for almost ten years. My family and friends find it hard to understand. I looked it up online. A lot of people do. In winter, when they walk for a while, their legs and buttocks begin to itch. If they don't stop, they will itch more and more, which is indescribable and unbearable. Besides, they will feel dirty and disgusting and want to throw up everywhere on the roadside. I just want to rush home and scratch hard when I itch. Walking in summer is generally not itchy, but you can't run and jump rope. My legs and body itch after less than 5 minutes of exercise. People who don't have this situation really don't feel that bad.

I asked the doctor once, and he said it might be urticaria and allergic to cold and hot air. I didn't take any medicine either. Now just try to avoid walking fast, dare not run, dare not exercise. Alas, there is nothing I can do!