my daughter's head portion , has become red why

A. It is looking like a rash so what you do is currently you can apply some coconut oil massage gently and let that be and if you want you can also apply calamine lotion it’s a cream that you can use and you can let it sit over wash the head tomorrow do it at least 3 to 4 times in the day and that should be beneficial yet if you require please feel free to consult your doctor as well