Hey ? Ladies, could someone tell me if they've ever experienced someth…

Hey ? Ladies, could someone tell me if they've ever experienced something like this? We've been trying to get better for a month now, but we don't understand what it is ?‍♀️ The pediatrician first thought it was probably an allergy to something, prescribed cicatric cream, dried it up a bit, helped a little, got slightly better, and then again, it's all gone wrong. We went to a dermatologist, too, he also says it's probably an allergy to vitamin D, supposedly an overdose, that I took vitamins and gave him vitamin D as well, everything was ruled out, prescribed ointments and finitill, still taking them, and again, zero results ?‍♀️?