The burning and numbness sensation on the right side of the face and the right side of the mouth may be caused by micro hemorrhage in the brain, inflammation of the facial nerve, fungal infection and other reasons. 1. Microhemorrhage in the brain: Microhemorrhage in the brain mainly refers to the rupture of blood vessels in the brain tissue, thus leading to bleeding, which will affect the function of the nervous system and cause numbness and burning sensation in the mouth and face in a short period of time. 2. Inflammation of facial nerve: viral infection, autonomic dysfunction, wind and cold will lead to spasm of nutrient blood vessels in the facial nerve, so that the facial nerve edema ischemia triggered by the disease, which is mostly manifested in the clinical expression of facial paralysis, and at the same time, there will be numbness and burning sensation in the oral cavity and face. 3. Fungal infection: usually do not pay attention to nutritional balance, oral environment is poor, and prolonged smoking and drinking will lead to a decline in the body’s immunity, so that the pathogenic microorganisms will invade the organism, resulting in fungal infections, the patient will appear in the oral cavity numbness, burning situation. It is recommended to go to the hospital for examination to clarify the cause of the disease and timely symptomatic treatment.