We have 2 boys aged 18 months and 5 months, our eldest has recently started slapping himself in the face or smacking his head on the baby gate/wall/door. I believe it's frustration at trying to communicate but does anyone have any tips on what to say/how to act to stop it? I've tried jumping up and quickly stopping him, ignoring it (causing me massive anxiety) or getting down on my knees and speaking to him about what he wants but he just gets so angry.