###Human: Why am I having red patch below the neck? ###Assistant: Hello. It is pityriasis versicolor (a type of fungal infection). Kindly follow the prescription. 1. Apply Clotrimazole lotion over the area BD for two weeks. 2. Maintain hygiene of the area. 3. Wash with mild soap and water. 4. Avoid Dettol and other irritants. You will get better.