Hello, there is a good saying: people who are slightly ill every year will definitely not be seriously ill in one year; People who don't catch a cold once a year must be seriously ill once they get sick.

Although you keep exercising and are in good health, you can't stop self-regulation. Being sick means that some parts of the body need adjustment and rest. Or take a cold shower without paying attention after exercise, which may be caused by sweating and undressing too quickly after exercise. Actually, the details are very important.