If a young patient suddenly develops numbness in the mouth, the following causes are mainly considered: First, it may be caused by eating special foods that cause food allergies, such as patients eating mangoes and other substances, in this case it is recommended that the patient immediately stop taking them, and at the same time can drink more water to promote metabolism and relieve the patient’s symptoms, but also pay attention to whether the patient has a rash, if there can be to the dermatology department for consultation. If necessary, you can take some anti-allergy drugs, such as Desloratadine tablets and so on. The second aspect is that the sudden numbness of the mouth in young people may be caused by cerebrovascular problems. If the patient is accompanied by clumsy language or crookedness of the mouth, it may be caused by minor cerebral hemorrhage, or transient ischemic attack or cerebral infarction, etc. In this case, it is necessary to consult the neurology department of the hospital for examination and treatment as soon as possible.