Itching for a year, repeated, I would like to ask the doctor is eczema or allergy

If there is only one symptom of skin itching, it may be caused by eczema, or it may be caused by allergies. At present, it is best to go to the hospital to do allergen examination, determine the specific cause and then treat, you can use antihistamine drugs, antiallergic drugs treatment. When skin itching is obvious, you can use calamine lotion treatment.