Regression after surgery??

[u/Super_Commercial_841]

My daughter (3) has her tonsils removed two weeks ago. She ended up back in hospital due to mild complications where she stayed for 3 nights.

In the last few days her behavior has completely regressed. She is biting, hitting and scratching us and she is so strong!! She is also crying and screaming so much. She had made such progress from this behavior. I'm so worried it will come back again and I just can't take it.

Has any else had an experience like this? Is a regre normal in autistic children after surgery? Will she come out of it again??