Carla:
I just answered a similar question the other day, so I'll just copy and paste that:
The problem with trying to prevent crashes is that you cannot predict when that may happen, and you could end up over-treating the child. All treatments come with risks and side effects, so it really does become a benefit vs. risk type of thing.
Most ITP patients do not treat to prevent drops, they deal with them as they occur. I know this sounds like a "too late then" type of thing, but really, ITP can last years and the long-term side effects can really add up, especially for one so young.
Treating children with ITP is already controversial. In the UK, they don't treat children much at all, and some of that thinking is filtering over here to the U.S.
People without ITP get nosebleeds too. When my niece was younger, she had horrible nose bleeds and the amount of blood that came out was enough to scare anyone. Just a light touch to her nose would cause gushing. She ended up having it cauterized. The point is, as long as it can be stopped without medical intervention, it's okay.
Yes, they do seem to keep lowering the count for treatment levels. As they find out more about ITP and patients state that treatments are worse than the disorder itself, things are changing. They tend to look at symptoms now more than counts which is actually a positive thing at times.
I keep pointing people to this video. It's very helpful:
fhs.mcmaster.ca/medicine/hematology/ITP-2010/player.html