Neck eczema can be caused by contact with foreign objects, physical irradiation, skin damage and their own diseases, as follows: 1, wearing cashmere, wool or chemical fiber, silk clothing or ties; 2, sunlight ultraviolet radiation allergy caused by; 3, applying sunscreen, moisturizer, shower cream caused by allergic reactions; 4, previous hyperthyroidism or thyroid nodules and other diseases caused by; 5, rubbing too The skin surface barrier function is damaged due to the use of force. After avoiding the above triggers, patients need to carry out anti-allergy treatment to achieve effective cure of the disease.