Dear friend, I did some basic research and discovered that there are only anecdotal studies on the various benefits of oil extracted from the marijuana plant but hardly any hard-core scientific data. The material on the net shows only relief with inflammatory conditions and some types of cancer. In your child s case, neither of these situations apply. Rather, the symptoms of pain and insomnia are probably due to compression of nerve roots as they exit the brain. Hence, in my humble opinion, I doubt if the cannaBINOID oils can do much for the Chiari 1 malformation. It might still be possible for you to try it if any recognised institute is planning to conduct trials on this kind of treatment. Your child can then join such a trial after completing the requirements for joining it. Dr. Taher