1. abnormal climate, 2. abnormal emotions, 3. abnormal food, 4. abnormal living habits, 5. abnormal room, 6. unpredictable and unexpected factors, 7. all factors that are harmful to the body and unfavorable to health. These factors are damaging to the body, avoiding it can reduce the damage to reduce the chance of illness, ignoring it will be a drop in the bucket, which will eventually lead to disease. Usually everyone can check whether they have disease-causing factors that are hurting them, or even hurting themselves. This is a factor that cannot be ignored.