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Greetings,Thank you for your question.I am Dr. Su S.I will try my best to help you.
How frequently does he do these movements?
When was he checked by doctor last?
Thank you for the input.A certain percentage of normal children will do hand flapping, head banging when excited, upset or bored.He is not injuring himself & those are not interfering with his sleep.As he tries to communicate & social otherwise, it should not be concerning.I feel you should not be worried.The movements would slow down with growth.I understand your concern.Only these movements are not indicative of autism.In autism actions are usually repeated and happen without any stimulation.
He does it only when he is denied anything or when he is hungry.
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Regarding talking & walking, some babies are late bloomer.
If his check ups with doctor are normal, then it is not concerning.
As he has got attention before without waiting, he now becomes frustrated when you are late to respond.
It is good that you are trying to make him more patient.
As he stops before he make contact, it suggests he is doing it to draw your attention.
Occasionally it may hit as he may not be cautious always.
This is not self injurious.
I hope I have answered all your questions.
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