Neck often itchy, many is solar dermatitis, contact dermatitis, neurodermatitis or ringworm symptoms, need to go to the hospital in time to clearly diagnose, and according to different causes of medication. 1. Solar dermatitis is caused by skin allergy to ultraviolet rays in sunlight, mostly seen in summer and fall, occurring in the face, neck, distal limbs and other exposed areas. Exposed parts of the skin color red, erythema and clothing cover part of a clear line of demarcation, itching obvious. 2. Contact dermatitis is an allergic reaction caused by the skin of the neck coming into contact with certain irritants, many of which are caused by items such as necklaces and scarves of poor quality. Manifestation of the neck skin appear and contact with the shape of similar erythema, erythema border clear, the surface of the papules or blisters, itching obvious. 3. The cause of neurodermatitis is unknown, and the immune function is low, local repeated friction and so on. It occurs in the back of the neck, head and upper eyelid, manifested as local skin roughness and thickening, itching obviously. 4. Ringworm is caused by fungal infection, transmitted through skin contact, and many people are infected by fungi from animals or other parts of the body to the neck. Performance for the neck skin with erythema, erythema border clear, can gradually spread to ring, erythema on the flaking, itching intense. There may be other causes of frequent itching of the neck, it is recommended to go to the hospital in time and follow the doctor’s instructions for treatment.