What's the matter with thick white tongue coating?

Tongue coating thick, white mainly has the following two reasons: 1, oral local problems;2, digestive system problems. Oral local problems are mainly due to poor oral hygiene, not carefully brushing teeth, gargle, and do not regularly go to the hospital for ultrasonic tooth washing, this kind of people's mouth will accumulate a lot of food residue and bacteria, tongue surface food residue and bacteria accumulation too much, will cause tongue coating white and thick, at the same time there will be oral odor symptoms. 2, digestive system problems, mainly due to indigestion, food accumulation caused by white, thick tongue coating, more common in people who like to eat greasy, indigestible food, or the patient himself has gastric ulcer, gastric dysmotility and other gastrointestinal diseases, these diseases cause indigestion, long-term food accumulation, will also cause white and thick tongue coating.