Patient's question:
Infant's black tongue coatingDoctor's answer:
Hello, according to your description, black tongue is caused by extreme heat turning into fire. Some people with gastrointestinal problems are prone to developing cold and dampness, which can make their tongue coating thick and greasy, starting white and gradually turning yellow or black. Clinically, it has been found that some chronic diseases, such as uremia, malignant tumors, etc., may also develop black tongue when the condition worsens. This is a sign of a serious condition and should be treated by a doctor in a hospital in a timely manner.