What about when you don't practice fitness equipment? What about when you usually sweat? What should I do if I don't sweat when practicing fitness equipment? Comparing different situations, it can be estimated that the problem lies in sweating? Fitness machine? Or when the body is hot? Or did you touch something? What substance do you eat? If you get rid of some special environment and conditions, it will ease or disappear, and there is a great possibility of allergies. Otherwise, it is your own skin disease, and you should see a dermatologist.