No sense of taste may be due to thicker tongue coating, nerve damage to the tympanic cord, and other diseases. 1. Thick tongue coating: The back of the tongue is scattered with bacillary papillae and contour papillae, and there are taste buds inside that control the sense of taste. If the tongue coating is thick and covers the taste buds, it will lead to loss or reduction of the sense of taste, as well as bad taste in the mouth. It is necessary to maintain oral hygiene, clean the tongue, and recommend the use of chlorhexidine or saline gargle. 2. Tympanic nerve injury: the tympanic nerve is the nerve that controls the taste impulses of the mucous membrane in the anterior 2/3 of the tongue. If tumors or inflammation affects the tympanic nerve, such as facial paralysis, it will lead to loss of taste. Tumor usually requires surgical treatment, while inflammation needs to be treated according to the cause of inflammation. 3. Other diseases: such as the new coronavirus infection also has the symptom of temporary loss of taste. It is recommended that patients with loss of taste should consult a doctor as soon as possible to identify the cause of the disease and treat the symptoms.