Causes of white moss on the tongue may include normal tongue coating, poor oral hygiene, gastrointestinal disorders, etc. Causes of hiccups and belching may include diet, gastritis, gastroesophageal reflux. 1. The causes of white moss on the tongue: (1) Normal tongue coating: normal people have a light red tongue and thin white moss. (2) Poor oral hygiene: gargling instead of brushing, or failing to maintain good brushing habits, etc., so that food debris, plaque, soft dirt, etc. deposited on the back of the tongue, the long term will form a whitish, thick and greasy tongue moss. (3) gastrointestinal diseases, such as chronic gastritis, gastric ulcers, etc., will lead to a weakening of gastrointestinal peristalsis, food stays for too long, excessive fermentation of food and acidic gases will be belching, acid reflux, partially discharged into the oral cavity, resulting in a poor oral environment, which will lead to the formation of a thick and greasy tongue. 2. Reasons for hiccups and belching: (1) Diet: may be drinking drinks that are easy to produce a lot of gas, such as carbonated drinks. (2) Gastritis: due to trauma, alcohol and other causes of gastric mucous membrane damage, the digestive function of the stomach becomes weaker, when the food residue or mucus in the stomach is less, hiccups and belching may occur. (3) Gastroesophageal reflux: Because of the damage to the anti-reflux structure and function, gastroesophageal reflux and gastric qi upward reversal (gastric qi rises instead of descends), the symptom of hiccups and belching occurs. In addition, there are many other causes of hiccups and belching with white moss on the tongue, if the symptoms are serious, or persist without improvement, it is recommended to go to a regular hospital in time, after clarifying the cause of the disease, targeted treatment under the guidance of the doctor.