Less is normal, more is abnormal. There are white particles on the tongue coating. Thick fur with fine particles is greasy fur, which is more common in food accumulation, phlegm turbidity, phlegm heat, spleen and stomach damp heat and so on. Those with loose fur and coarse particles are rotten moss, mostly due to excessive yang heat, turbid stomach due to transpiration, and gastrointestinal tract or phlegm accumulated in staple food. Stick out your tongue and see if it is covered with a layer of white tongue. Be careful that this may be one of the culprits that cause your appetite to increase greatly. People who regularly smoke, drink, eat processed food and have a heavy taste have more serious tongue-fetus phenomenon than those who eat a light diet. This means that their saliva secretion is less and their taste buds are less sensitive. No matter how much they eat, they feel unsatisfied. Only by ingesting enough alkali and oil can they be satisfied, which is easy to cause the phenomenon that their appetite is out of control. Take out a soft toothbrush and gently brush off the dirt on your tongue and sublingual, which can not only restore your taste, but also prevent bad breath.