Betel nut and tobacco may cause inflammation of the gums, mucous membrane fibrosis, bad taste in the mouth, the emergence of nerve excitement addiction hazards, and even carcinogenic. Long-term betel nut and cigarettes will easily form an anaerobic environment in the mouth, which may promote plaque adhesion, and stimulate inflammation of the gums, and may also cause discoloration of the gums. Betel nut tends to cause fibrosis of the mucous membrane after chewing, stimulating the mucous membrane to develop conditions such as lichen planus and white spots. Tobacco contains tar, nicotine, carbon monoxide and many other harmful substances, which can cause stomatitis, acute bronchitis, chronic bronchitis, obstructive pulmonary disease and many other diseases. Regular chewing of betel nut and cigarettes can cause bad taste in the mouth and symptoms of bad breath. Betel nut and tobacco will stimulate nerve excitation, addictive, usually prone to mental slackness and fatigue. At the same time, betel nut and tobacco are class 1 carcinogens, and are associated with oral cancer, lung cancer and many other cancers. It is recommended that those with the above symptoms go to the hospital in time for treatment and correction of bad habits.