The symptoms of numbness in the mouth after eating grapefruit are considered to be caused by grapefruit allergy, which has a relationship with the patient’s constitution, for grapefruit allergy, the patient should stop eating grapefruit, drink more water, if there is vitamin C at home, you can take a piece of vitamin C. There is also the observation of changes in the condition, if the mouth numbness is serious, or a red itchy rash around the body, that should be considered to make the allergy aggravated, to take oral If the patient has difficulty breathing, wheezing and other symptoms, it is considered to be allergy-induced laryngeal edema, which must be treated by the hospital in time, because laryngeal edema may lead to asphyxia and threaten the life of the patient.