Why Did My Neck Suddenly Become Red and Itchy?

Sudden redness and itching on the neck may be caused by contact dermatitis, acute urticaria, fungal infections, and other reasons. It is recommended to seek medical attention and follow the doctor's instructions for treatment through topical and oral medications. Details are as follows:

1. Contact Dermatitis: The neck is easily exposed to external allergens, causing contact dermatitis, which manifests as sudden redness and itching. Topical glucocorticoids such as Compound Dexamethasone Ointment and Hydrocortisone Ointment can be applied. In severe cases, oral medications such as Loratadine Capsules and Chlorpheniramine Maleate Tablets can be combined for treatment.

2. Acute Urticaria: After exposure to allergens, temporary localized skin diseases may occur, manifesting as redness, swelling, and itching, forming wheal-like symptoms. Topical medications such as Calamine Lotion and Mometasone Furoate Ointment can be used to relieve itching, while oral medications such as Cyproheptadine Hydrochloride Tablets can be taken for treatment.

3. Fungal Infections: Neglecting neck hygiene can lead to fungal infections, resulting in symptoms such as red papules, itching, and scaling. Therefore, the neck may suddenly become red and itchy. Topical medications such as Clotrimazole Cream and Compound Ketoconazole Cream can be applied, while oral antifungal medications such as Terbinafine Hydrochloride Tablets can be taken for treatment.