Patients with yam allergy are not recommended to consume yam if they experience discomfort after contact or consumption, but some people are only physically allergic to yam and have no discomfort after consumption, so they can consume it in moderation. Yam allergy can be manifested as a local skin allergy after contact with yam, as well as after eating yam systemic allergy symptoms. Because yam contains ingredients such as saponin and phytolacca, if the patient is sensitive to these ingredients, coupled with personal physical factors, there will be corresponding discomfort symptoms, such as local skin redness, itching, tingling, etc., then yam should be avoided. If symptoms of yam allergy appear, corresponding treatment measures should be taken promptly, such as warm water wiping, using glycolic lotion to clean the skin, etc. Try to avoid allergens in life to reduce skin sensitivity. If itching is obvious, antihistamines such as levocetirizine hydrochloride and loratadine can be taken for treatment under the guidance of a doctor. If the allergy symptoms are more serious, accompanied by breathing difficulties, increased heart rate and panic, you should avoid self-treatment and go to the hospital as soon as possible.