Appropriate chewing gum can play a role in fresh breath and clean teeth, but chewing gum often may bring certain health hazards. 1, induce headache: chewing gum after eating too much, it will lead to jaw joint or bite muscle soreness, and in serious cases may make the relevant muscles of the head and neck contraction, thus inducing earache, headache and other uncomfortable symptoms; 2, cause gastrointestinal discomfort: chewing gum after eating too much, the air may then swallowed into the abdomen, which in turn may cause abdominal distension, abdominal pain. Eating chewing gum for a long time will reflexively cause an increase in the secretion of gastric acid and digestive enzymes in the stomach, which will lead to acid reflux, hunger and other symptoms, and may lead to gastric ulcer and gastritis and other diseases in the long term; 3, causing temporomandibular joint disorders: eating chewing gum for a long time will make the temporomandibular joint move frequently, resulting in excessive load on the nerves and muscles that control the temporomandibular joint, and the long-term excessive load may cause these muscles and The nerve will be damaged, so that the TMJ disorders such as joint dislocation and joint pain will appear; 4, damage the oral health: chewing gum for a long time and a large amount will aggravate the tooth wear and damage the oral mucosa, when chewing, the sugar will stay in the mouth for a long time, and a polysaccharide substance will be formed under the action of oral bacteria to adhere to the tooth surface, thus forming plaque, and plaque will ferment and produce acid to cause caries. Long-term existence of plaque will ferment and produce acid, leading to dental caries; 5. Swallowing or accidentally entering the trachea: For children with relatively poor self-control ability, chewing gum may increase the risk of accidentally entering the trachea. In summary, chewing gum is generally not recommended to be too long, master the number of chewing and chewing time, stomach disease patients should not chew more gum, so as not to aggravate the gastrointestinal discomfort.