Unknown rash on belly

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this rash as got more red and itchy/ irritated over the week not like any eczema i had as a child or skin Irritation rash ive had before i do how ever have Sensitive sensitive skin does anyone know what it could be?

Many viruses, including those that cause common childhood diseases, can produce rash. Scarlet fever often begins with a rash on the stomach before spreading to other parts of the body. Rashes can be caused by an allergic reaction to food, medications, or products such as lotions or detergents