No sense of smell and taste may be recovered in about 5~7 days, but it is not absolute, there are differences between individuals, and the above symptoms may persist without relief, so we should consider that it is caused by other causes. Viral infection after a cold can cause congestion and edema of the nasal mucosa and increase secretion, resulting in no sense of smell; viral infection after a cold can lead to a decrease in the sensitivity of the gustatory nerve, resulting in no sense of taste. Colds are generally self-limiting, often lasting for about 1 week. As the viral infection gradually subsides, the sense of smell and taste will return to normal, and the duration of the disease varies from person to person. The absence of smell and taste after a cold is usually transient. If the symptoms do not improve after 7 days, other factors such as inflammatory edema of the olfactory nerve and central nervous system diseases should be considered, and the patient should go to a specialist for examination and treatment. During the cold, the sense of smell and taste is reduced, try to choose light and easy to digest food, pay attention to keep warm to avoid the wind and cold, if necessary, you can follow the doctor’s instructions to use nasal spray glucocorticosteroids, such as budesonide, fluticasone propionate nasal spray to relieve the olfactory edema, reduce the inflammatory response.