Wearing a turtleneck sweater neck itch may be caused by contact dermatitis or local factors. 1. Contact dermatitis: some patients wearing turtleneck sweater neck itch may be sweater with irritation or sensitization, resulting in local skin allergies, causing neck itching, bumps and other symptoms. 2. Local factors: if you wear a turtleneck sweater may be obese, sweaty, resulting in local skin irritation, can also cause neck skin redness, itching. Do not scratch in ordinary life, to avoid serious inflammation and infection, etc. It is recommended to go to the hospital to check allergens, to find out the cause of itching skin. Stop wearing turtleneck sweaters, or add a piece of cotton intimate apparel in the sweater, and try to avoid scratching your neck with your hands.