I would recommend that you see an Ear, Nose and Throat Specialist to examine the ears and remove the wax if necessary. After that when all medical possibilities are ruled out then see an Audiologist that can evaluate the functioning of the middle ears as well as his hearing. If you don't know of an Audiologist and ENT in your area, then please let me know and i will gladly refer you (firstname.lastname@example.org). It is very important that you have his hearing evaluated as soon as possible, if there is a hearing problem temporary or permanent then he will be loosing a lot of language and learning and one need to get to the root as soon as possible.
Please let me know if you need any further information
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