An itchy rash on the neck can be caused by a variety of factors, including hygiene, environment, and irritation. Here are some remedies that can help alleviate the itchiness:

• Over-the-counter anti-itch lotions: These can help relieve the itchiness caused by the rash.
• Moisturizers: Using moisturizers such as Cetaphil, Eucerin, or CeraVe can help soothe the skin and reduce itchiness.
• Cooling creams or gels: Calamine lotion or other cooling creams or gels can help reduce the itchiness caused by the rash.
• Oatmeal bath: Soaking in a bath with oatmeal or applying a paste of oatmeal and water to the skin of the neck may help reduce the itch.
• Baking soda: Adding baking soda to a bath or oatmeal bath may also help reduce the itch.
• Cold wraps: Wrapping the neck in a cold towel or placing an ice pack wrapped in a towel on the neck may help people find temporary relief from itching.
• Antihistamines: Over-the-counter drugs such as antihistamines can help reduce any allergic reaction that may be causing the rash.
• Hydrocortisone cream: Applying hydrocortisone cream (1%) can help soothe a neck rash.
• Gentle cleansers and warm water: Use gentle cleansers and warm water to clean the skin, and pat dry the affected area and leave it exposed to air.
• Avoiding chemicals: Switching out a certain product, such as a soap or shampoo, may help clear up the itch. Choosing gentle, hypoallergenic products instead may help clear up the itch.
• Wear natural clothing: Wearing natural clothing such as cotton can help reduce irritation.

If the rash does not respond to self-care, it is important to consult a healthcare provider. They may prescribe additional treatments such as corticosteroid creams or calcineurin inhibitors.