There are cheap prescriptions out there. Some of the older generic steroid creams/ointments. Just ask the doctor or a pharmacist.
One thing I didn't see mentioned is to find a "skin routine."
It helps to prevent flare-ups.
My older boy had it and it was misdiagnosed initially. No fault of the doctor, it looked like ringworm! It started oozing and I was told to bring him b/c the antifungal obviously wasn't going to work. I felt so bad for him! He also had a cast on his leg for a few weeks. It must have been so itchy.
After we got control of it with a steroid ointment, I tried a few different things until I found that Aveeno worked best for us. I would swear by this. But that is for my kids.
For my kids:
1. I use a "free" laundry detergent. I actually use the Costco brand. NEVER use Tide for people with sensitive skin. I have been told by a dermatologist that it is the strongest/harshest detergent.
2. I can only use Avon brand bubble bath. The character bottles make them have flare-ups.
3. When things are going good, our routine is using Aveeno ASAP after their bath. Everyday! When their skin seems a little dry; I bump up the Aveeno to twice a day. If I see a dry patch, I lather that bad boy as much as I can remember during the day! I try to avoid using the steriod ointment.
If you keep it under control, it usually won't get bad that often.
I have seen other people mention about a possible food allergy. That is also something to look into.
GL!