Itchy neck may be caused by physiological factors such as poor hygiene habits, followed by eczema, hives and other factors. 1. Physiological factors: poor hygiene habits, do not pay attention to clean the skin, may make the neck of the skin retain dirt, thus triggering the symptoms of itchy neck. 2. Eczema: Eczema is mainly characterized by red spots, pimples and itching, which can be distributed on all parts of the body surface. The cause of eczema is complex, and may be related to genetic, immune abnormalities and microbial factors. 3. Urticaria: Urticaria is often characterized by angioedema, wheals, etc. It is often accompanied by itching, and can develop everywhere on the body. The cause of urticaria may be food, infection and physical factors. There are more causes of itchy neck, and after excluding physical factors, patients are advised to seek medical examination to clarify the cause.