Itchy red rash on the neck usually requires identification of the cause and treatment of the cause and symptoms under the guidance of a doctor, with medication being the main treatment. A red rash with itching on the neck is usually a sign of allergic dermatitis. First of all, you need to find and keep away from the allergens to eliminate the underlying factors of allergy and prevent the recurrence of allergic symptoms. Desensitization and anti-inflammatory and itch relief treatment can be carried out with medications under the guidance of a doctor. Common anti-allergy drugs include loratadine, cetirizine, paracetamol, etc. At the same time, glucocorticoid ointment can be used for local treatment, and external rubbing of glyburide lotion is also effective in relieving itching symptoms. If the medication does not relieve, you need to go to the hospital in time to see a doctor. During the treatment process, reduce spicy and stimulating food, avoid excessive scratching due to itching to avoid aggravating the disease.