There are many causes of red tongue and white greasy tongue, such as improper diet, gastritis, environmental factors. 1. Improper diet: patients usually like to eat greasy, fried, cold food, may lead to the phenomenon of tongue tip red tongue root white greasy. 2. Gastritis: patients suffering from gastritis, may affect the digestive function, resulting in the accumulation of food in the stomach, due to gastric acid reflux, belching, reflux and other factors, resulting in the tip of the tongue red tongue white greasy. 3. Environmental factors: living in a cold, damp environment for a long time may also lead to the phenomenon of red tongue. There are many reasons that lead to the red tip of the tongue, suggest that the patient can go to the hospital to improve the examination, after a clear diagnosis to give standardized treatment, so as to avoid misunderstanding the condition.