1. Cardiovascular diseases: Smoking is related to coronary heart disease, hypertension, sudden death and thromboangiitis obliterans. Smoking can promote thrombosis and reduce the sensitivity of human body to the precursors of heart disease.
2. Respiratory diseases: chronic bronchitis, emphysema, chronic obstructive pulmonary disease and lung cancer.
3. Diseases of digestive system: peptic ulcer, gastritis, esophageal cancer, colon diseases, pancreatic cancer and gastric cancer.
4. Cerebrovascular diseases: Smoking increases the risk of cerebral hemorrhage, cerebral infarction and subarachnoid hemorrhage. In addition, smoking can also damage brain cells, memory, thinking ability, and cause mental disorders.
5. Endocrine diseases: Smoking 20 cigarettes a day can increase the risk of diabetes by 1 fold. Smoking can also promote thyroid diseases.
6. Oral diseases: such as lip cancer, oral cancer, oral leukoplakia, candida albicans infection, oral mucosal pigmentation, oral odor, etc.
7. Ophthalmic diseases mainly include toxic optic neuropathy, decreased visual adaptability, macular degeneration and cataract.
There are many ways to quit smoking: firm perseverance and scientific means.