Thick, white and fat tongue coating generally indicates the presence of phlegm (a pathological product formed as a result of impaired water-liquid metabolism), dampness and turbidity, etc. Taking Sijunzi Pill may be ineffective, and is therefore not recommended. It is recommended to treat with medication under the guidance of a doctor. Sijunzi Pill, consists of Radix Codonopsis, Fried Atractylodes Macrocephalae, Poria, and Scorched Licorice. It has the effect of benefiting qi and strengthening the spleen. It is used for poor appetite and loose stools caused by deficiency of spleen and stomach qi. Avoid indigestible food while taking Si Jun Zi Wan. Not suitable for patients with fever and cold. If symptoms are not relieved after 4 weeks of taking the medicine, go to the hospital for consultation. If the symptom of thick, white and fat tongue coating is not relieved for a long time or accompanied by other discomforts, consult a doctor promptly to find out the cause and carry out targeted treatment.