My skin is easily allergic. Recently, the weather is hot, and it is easy to sweat when exercising, and my face will be red and itchy. What should I do?

Go to the hospital for examination. This is a common eczema, which is caused by low local immunity. This is inevitable. I suggest you drink some Chinese medicine to recuperate the jade. I wish there were old Chinese medicine practitioners in civilian pharmacies. I've done this twice.