The elderly have a loss of taste sensation related to the atrophy of taste buds, which can be induced by physiological and pathological factors. Physiological causes often include emotional changes, etc., while pathological factors often include atrophy of the tongue papillae, nutritional deficiencies, nasal stenosis, nerve abnormalities, psychological problems, oral fungal infections, etc. A, physiological factors: If the elderly appear emotional changes, such as emotional depression, depressed mood or anger, etc., may also be insensitive to the taste of food, do not feel the taste of food, and then feel their sense of taste is diminished, there is a decline in appetite, this situation can be restored after improving the mood. Second, pathological factors 1, tongue papillae atrophy: with the gradual aging of the body, the elderly tongue papillae, oral mucosa, tongue muscle atrophy, taste buds significantly reduced or even disappeared, there will be a loss of taste performance; 2, nutritional deficiencies: because zinc can promote the synthesis of gustatory elements, if the elderly are seriously deficient in zinc and vitamin B and other nutrients, there may be a loss of taste performance; 3, nasal stenosis: when a local occupational lesions, it may lead to nasal narrowing, nasal congestion and loss of sense of smell, which is likely to affect the sense of taste. This is because the sense of smell can help distinguish some fine distinctions of taste, and the loss of smell, the ability of the sense of taste to distinguish food will also be reduced; 4, nerve abnormalities: oral surgery, facial nerve palsy or trigeminal neuropathy can cause damage to the nerves that govern the sense of taste, as well as autonomic disorders resulting in neurosis episodes, are prone to reduce the sensitivity of the sense of taste in the elderly, and the appearance of hypoesthesia. Some of the elderly cranial occupational lesions can compress the facial nerve or lingual nerve, which may also lead to hypogustation; 5, psychological problems: such as depression, anxiety disorders, these psychological disorders are mostly triggered by long-term tight emotions, extreme pessimism, strong fear, etc., can lead to hypogustation. However, the general taste nerve function does not occur abnormally, and this condition is due to serious mental problems that cause patients to lose interest in food; 6, oral fungal infection: episodes are mostly related to diabetes, active denture unclean, low resistance, weakness and other factors, can lead to oral infection Candida albicans, white spots on the tongue, or even white spots fused into a sheet and other symptoms, can also cause the elderly to lose taste. In addition, the elderly may also have a loss of taste related to long-term use of drugs, some drugs such as regulating hypertension drugs, antibiotics, etc., long-term use of drugs may have a loss of taste, such as loss of taste should be timely communication with the primary care physician to change the medication. The elderly need to actively prevent and delay the loss of taste. It is recommended to try not to stimulate the tongue papillae, eat a light diet, and eat less spicy and stimulating food. If the loss of taste function is caused by disease factors, prompt medical attention should be sought to clarify the cause and professional treatment.