My 6 month old has just started to cover his ears in response to certain noises. It isn't all noise and some loud noises he doesn't do it.. he done it today when a lady spoke directly to him in a café. I'm really worried about this in case it is some sort of sensory issue? Or has he just discovered that his ears feel sounds... Or is teething causing his ears to be more sensitive? Had anyone else had their lo do this? Obviously I am now worried about autism and there are also others within the extended family who are on the spectrum. Is this something I should flag with my HV?