Neck itching can be caused by ringworm, prickly heat, allergic dermatitis and other factors, patients should promptly seek medical attention to clarify the cause of the disease and then carry out appropriate treatment. 1. Ringworm: Neck itching may be caused by fungal infection caused by ringworm, there will be localized pimples, clear boundaries of the red ring-shaped damage. 2. prickly heat: if the patient is staying in a high humidity and high heat environment after the neck itching, and localized small raised pimples or blisters, should be considered to be prickly heat caused by, out of the high humidity and high heat environment can gradually subside. 3. Contact dermatitis: neck contact necklace and other metal products, or non-cotton sweater, easy to appear localized contact dermatitis, manifested as erythema, pimples and other damages, accompanied by itching, tingling sensation. Specifically need to go to the hospital, clear cause.