Correct and proper consumption of tea generally does not cause significant harm to the body, but smoking can be hazardous to your health. In general, drinking light tea in moderation will not cause significant harm to the body. However, if patients drink expired tea, or tea that has been stored for too long and has deteriorated, it may cause diarrhea, abdominal pain, nausea, vomiting and other physical discomfort, and patients suffering from gastric diseases may also suffer from physical discomfort if they drink strong tea excessively. There are many hazards of smoking. The nicotine in tobacco will make the central nervous system dependent. Cigarette tar, long-term inhalation may cause bronchial mucosa epithelial squamous metaplasia, may cause bronchial and lung inflammation and cancer. And smoking will produce a large amount of carbon monoxide, long-term intake may cause cardiovascular disease. It is recommended that patients drink tea in moderation, try not to drink tea at night, so as not to cause insomnia, and try not to drink strong tea or tea on an empty stomach. Smoking is not good for the body, and patients are advised to smoke as little as possible or not to smoke.