The tongue can be brushed, but tongue brushing is generally not recommended. Brushing tongue coating also has no therapeutic effect on the disease, and brushing tongue coating before the consultation will affect the physician’s correct judgment of the disease. Tongue moss is a layer of moss scattered on the tongue, formed by the stomach qi upward fumigation of the stomach grain qi, food turbidity, cohesion on the tongue. By observing the tongue coating, you can understand the health condition of the body. Normal tongue moss is thin, white and even, moderately wet and dry, and slightly thicker in the middle and root of the tongue. In pathological conditions, the tongue coating will change, showing yellow greasy moss, white rotting moss, black dry moss, etc.. Even if you are used to brushing your tongue, it is recommended that you do it with appropriate frequency and gently with a soft-bristled brush. If you find abnormal changes in your tongue coating, it is recommended to actively go to the hospital to seek professional and standardized diagnosis and treatment.