I have a 4 year old, she spent all day outside with her mom. Now she has a rash just on her upper lip, where a man would have a mustache, it is a pinkish purple color, it doesnt itch, burn or hurt. It isnt raised but it is almost solid across her lip. What should i do? Could it be an allergic reaction? Or irritation from something? I know its not poison ivy, oak or sumac. Should i take her to the doctor now, in the morning, or should i wait and see? She isnt complaining at all.