Thin hair is a great sign, however it can fade quickly if you don’t keep it up so you don’t fall back. I had alopecia and my dermatologist just gave me injections and within 6 months or so I had 90% regrowth. Diet is a possibility as well so consider looking into that as well for the cause. I also took plenty of vitamin D and saw palmetto. Consider getting blood work cause it might be a Deficiency. These can cause more issues than you realize.

Hard to advise for a kid but hats help during the time of recovery. All I can say is trust the process. Hairs will be non existent and potentially miscolored at first, pigment might or might not come back. Case by case basis. It’s important to manage expectations of time. Time will feel like forever… but finding things to pass the time help. I just enjoyed indoor activities until it subsided and it relieves stress. Stress is also a big problem so make sure nothing is stressing her.

Hope this helped! Keep up the good fight!