1 years old has rash

Jasmin

My 1 year old daughter has a rash on her lower back for about 3 weeks now and she scratches all day and as much as we try to stop her she still tries.

She has

been given antibiotic medicine and ointment along with Benadryl. Her rash just doesn’t seem to be getting any better and the doctor doesn’t know what it is. Has any other mom had this rash with their babies?