Ice Pick Headaches, MRI, Chiari Malformation, Nerve Pain. Suggest.
Ice pick headaches of your daughter are very unlikely to be related to Chiari malformation. Those are likely to be part of migraine( if she has migraine) or primary stabbing headache. Since she has frequent attacks, it is better to put her on prophylactic medication for migraine.
Let her pick a book now. Let her note down all the instances of such headache, timing of the day, which part of the head, which medicines help etc in the book and present it to the doctor during her regular appointment. That helps the doctor a lot to diagnose. A symptom of headache needs a detailed history and less examination. So try to detail about it.
Kindly consult a local neurologist who will examine her and give appropriate medication.
Hope this helps in allaying your anxiety about Chiari malformation, it helps you assist your daughter.