How long is the recovery period after the surgery to fix a chiari malformation?

7 days. The in-hospital stay after a decompression is anywhere from 1-5 days. The patient may need a period of up to 1 month to be 100%. Most do quite well with 7-10 days of rest before resuming most activities.
Several days. Hospitalization should be only several days. After the hospitalization yoiu should expect a relatively short recovery phase and return to work.
Short interval. Your surgeon is the person to answer such a question. However, most cases involving cervical craniectomy recover within a week or two. The surgery itself is fairly simple, but the risk of complication is high. If significant symptoms persist, a thorough evaluation may be necessary.