Hi,
My 23 year old daughter has suffered eczema since she was a baby, so I'm well-acquainted with your situation. I think it's deplorable that the dermatologist is making you wait until October, and I suggest that you either get a different dermatologist, or ask your pediatrician for some mild cortison skin ointment to tide you over until your October appointment. You can also look for a pediatric allergist, since eczema is frequently a symptom of allergy and allergists are very used to treating eczema. And, in the meantime, in case her eczema is allergy-driven (which it very often is), you might try giving her benedryl at bedtime for a few days and see if that clears her up.
Unfortunately, eczema can either worsen or improve at certain metabolistic shifting points in your child's life, one of which is around 8 years old - and may possibly be contributing to your daughter's worsening situation. If you haven't already figured out whether there's an allergen trigger, try some of the following while you wait for your appointment (you may have already done all these things):
1. get allergy-free laundry detergent and rewash all your daughter's bed linens and clothes
2. get the heavy-duty allergy filters for your airconditioner to get more dust, mold and pollen out of your home air
3. explore the possibility of food allergies - take your daughter off all foods except those suspected to be hypoallergenic for most people. Here's the list I've seen:
"An Allergy Avoidance Diet emphasizes the consumption of a wide-range of so-called hypoallergenic foods. These foods include lamb, pears, apples, rice, most vegetables, most beans and legumes (except peanuts) and the non-gluten grains (for example, millet, quinoa, and amaranth).
Typically the only sweeteners allowed are maple syrup or brown rice syrup. Acceptable beverages include rice milk, pear nectar, chamomile tea, and sparkling water (without any added sweeteners)." That's from http://www.whfoods.org/genpage.php?tname=diet&dbid=7
Then you add something back every three days (it takes a few days for some allergy reactions to show up). Doing this will make food prep (and unless your daughter loves lamb and pears, her mood) annoying for a few days, but we were told that allergy testing doesn't really have high validity for young children and this is the only way to definitively figure it out.
Another (less traumatic) way to test for food allergies is to remove a suspect food (dairy, for example) for several days to see if you have a beneficial change in the eczema. The problem is that it is easier to spot an eruption when you add a new food than to figure out whether removal of a food is causing the beneficial change, or whether it just healed itself over time, etc.
As for skin care while you're waiting, your pediatrician should be able to give you a mild prescription-strength cortisone cream. If you are worried (as I was) about the absorption of cortisone into her body through her skin over the long-term, there is a test that you can get to check cortisone levels. I had my daughter tested a few times and she never showed dangerous levels of cortisone, even when things were REALLY REALLY bad and we had to give her a round of oral cortisones to break the cycle (this happened maybe ten or twelve times in 20 years).
A way to heal the skin faster is something called "occlusal," which you can do with a fancy purchased occlusal rap, or with saran-wrap. Occlusal means forcing the moisturizer or medication into the skin by putting the cortisone cream on, waiting a few minutes, then putting the eucerine on, then wrapping the leg, arm, elbow or whatever in saran-wrap, and securing it with a piece of tape and leaving this on for a few hours - however long your daughter can stand it. We used to do this at bedtime, because it's less annoying to sleep through it, especially if you're using Benedryl in the evenings for itching.
I hope some of these suggestions help you. I feel for both you and your daughter. My daughter used to be so embarrassed by her break-outs that she would wear long sleeves and long pants, even in the hottest Phoenix weather (where we're from) to hide it. The worst parts are (1) that it takes a five minute exposure to something to break out, and then sometimes weeks and weeks to cure up, and (2) watching your child itch and scratch and suffer.
Good luck, God bless and feel free to contact me if you want to talk more about this...!