1. It’s because your karma of life and death was relatively heavy in the past, so the result in this life is to be sick.
2. It comes from your own temperament. Resentment, anger, and annoyance, if you commit them frequently, will lead to physical illness. Therefore, having a good temperament is the first feng shui of the body. Don't blame others, look at the benefits of others in everything, and learn from the benefits of others is adding positive energy to your body and increasing your yang energy. If you have problems, look for the reasons within yourself instead of blaming others.