Good evening doctors, my son is exactly 21 months old, he weighs 11kg, he had a fever of 100.1 from yesterday night,  fever is in control. he had pain while sitting I noticed his groins are little red, and had like a diaper rash, i texted his pediatrician, I was instructed to give paracetamol and a rash Cream.. does diaper rash cause fever??! Will it go away on it's own??!! Please let me know doctors thank you.