Taste loss may be caused by local environmental factors, neurological damage, nutritional disorders, and mental factors. 1. Local environmental factors: too cold or too hot in the mouth may result in transient taste loss. 2. Nervous system damage: such as tympanic nerve damage, head injury, etc. may lead to loss of taste. 3. Nutritional disorders: such as zinc deficiency, vitamin B3 deficiency, vitamin B12 deficiency, etc. may lead to loss of taste. 4. Psychological factors: such as mental anomalies can lead to loss of taste. There may be other reasons for the loss of taste, it is recommended to go to the hospital in time, complete the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.