Girls, urgently. I need advice. My daughter seems to have diaper rash.…

Girls, urgently. I need advice. My daughter seems to have diaper rash. It's a little bit, but it's so red. She fell asleep, she's lying down without anything. Can you advise me on Sudocrem to smear under the diaper? On the bottom is okay, but around the pee? Should we go see a pediatrician tomorrow or directly to a dermatologist?