Hello everyone. Girls, maybe someone has encountered this. The baby on…

Hello everyone. Girls, maybe someone has encountered this. The baby on the penis (sorry for the details) seems like a rash. It happened a couple of times, I smeared cream or powder and it went away, then they reappear again. What could it be?! Should I be worried? Or is it just as I think, diaper rash, but the point is that it's a rash only on the genitals... well, maybe an allergy to something and through urine gives you a clue. ??‍♀️ First child, I don't know what to think about / help me with advice on what to do?