Yam to get on the skin especially itchy consider contact dermatitis is more likely, should promptly avoid contact with yam, wash with water in a timely manner, or through topical drugs or oral medication and other treatments. Yam contains alkaline substances, can stimulate the skin itching, tingling, etc., and in severe cases may also appear erythema, papules, pimples, etc.. When itching occurs when yam comes into contact with the skin, you should immediately stop continuing to touch the yam, rinse with water, or wear gloves to handle the yam, etc. If the local symptoms are severe, with the appearance of red rash, papules, papules, etc., you can use topical glycerite lotion, etc. to relieve the symptoms; or combine with oral antihistamines, etc. to relieve the symptoms, such as loratadine and chlorpheniramine maleate. If severe itching occurs on the skin after contact with yam, you should go to the hospital in time for examination and use the above medications as prescribed by the doctor, and do not use your own medication.