Hi... you can put some diaper cream on her and monitor. If condition doesn’t improve, please bring her to see a doctor
Please do take your baby to the pd. May not be anything serious but the sooner you apply the right cream the better.
Best to see a doctor. Don’t try to self medicate especially if you’re not sure what the condition is.
Please observe the condition for a day and if the situation persist, please consult your PD
Rash after fever it’s normal.. however if you are concern pls seek advise from your PD.