Chinese medicine believes that the cause of red tongue with white coating is usually related to heat and dampness. The tongue in heat syndrome is usually white and dry, and the tongue in wet syndrome is mainly white and greasy. Tongue red moss white and dry is often due to heat in the body, the blood get hot line, heat makes blood vessels dilation, blood flow acceleration, qi and blood steam, resulting in the tongue veins full of red tongue, the spleen and stomach water and grain gas on the tongue and the performance of the tongue moss white and dry. In addition, dampness can also be manifested in the case of red tongue with white moss, dampness is trapped in the spleen and stomach, the obstruction of the operation of the water and liquid, up to the tongue, and there is a red tongue with white moss. Patients with red tongue and white moss are advised to go to regular hospitals for treatment under the guidance of professional physicians.