The skin is very itchy after washing the yam is considered to be contact dermatitis, the first thing you need to do is to stay away from the yam and observe your condition. If the localized symptoms only appear itching, you can wash the affected area with water. If the local symptoms are obvious, such as intense itching, redness, swelling and even blisters, you need to consult a doctor in a timely manner, and follow the doctor’s instructions for medication. After washing the yam skin is very itchy may be their own yam allergy caused by contact dermatitis, the first need to stay away from the yam. If the local skin is only itchy, you can use warm water, soap and other mild items to wash the local, can relieve the itchy situation. If the local skin itching is obvious, blisters and other conditions, you need to immediately seek medical attention, follow the doctor’s instructions to apply hydrocortisone, dexamethasone and other glucocorticoid drugs, can help reduce inflammation, relieve the itching of the situation. Contact dermatitis, the first need to stay away from the causative agent, and observe their own situation, if the condition is serious, you need to consult a doctor in a timely manner, with the doctor for standardized treatment.