Long-term no exercise, one-time excessive exercise, brain hypoxia, just take a rest. Fitness should be gradual. Lift up quickly to practice explosive power. If it is too slow, the muscles will be large but uncoordinated. It is also safe to slow down and practice control and endurance for your reference. I hope I can help you and wish you a happy life.
This condition may be friction dermatitis, or it may be related to allergic or infectious factors.
Fitness people don't eat processed food. Healthy people don't eat processed food. Because they know that processed food is not as nutritious as their own natural food.