rash maybe ?

gabrielle

my daughter didn’t have this on her back at first but I went to visit my mom and this started to happen slowly but it’s gotten a little bigger . does anyone have an idea of what this could be ? she does turn 4 months on the 20th so i’ll be able to take her to the doctor and find out for sure but for now i want to try something to maybe help it clear up a little . any advice ?