Question about my daughter's behavior.?

I have 3 sons with various levels of autism, my youngest son does something similar when he gets frustrated where he bites his fist and either pounds on his head with the other fist or just swings the other arm around in an agitated fashion, I can't tell if your daughter has mild autism, but if she does, it's not unusual as boys are more likely to be born with the autism gene, but it's still rare, but it does occur with girls as well, just not as common.

If she doesn't have any other "symptoms" other than what you described, then if she's meeting all the other benchmarks for "normal" development for a young girl. then as long as it doesn't interfere with her growth or progress developmental wise, I would just keep an eye on that behavior to make sure it doesn't become anything else more serious, like Cerebral Palsy.

If she can't stop herself from doing this behavior you're describing, the best thing is to get her checked for C.P. as it often strikes young children, better to have it be a false alarm than to be caught off guard if it's something serious like C.P.

It may not be tourettes but it is likely some kind of neurological quirk.

This could be something that you can help her with later in life by knowing what it is at a young age, so I think you should continue to ask questions until you have some credible answers. Wish I could give you a precise term but you should rely on qualified people rather than y/a

Oh kids can be funny, they do the strangest thing, yes my little boy did that or similar, but a year later he stopped and now doing an even different excited movement!

My litle cousin does the exact same thing and she is completly healthy. Its nothing to worry about believe me :)