Hi....at this age you don't have babies crying for no reason and it sounds like he is in pain when this happens. I wouldn't sit around guessing on this, get him to his pediatrician and go from there.
he proably want some attention
does he have colic ,that very bad wind..is he too hot he can get what they call eyes rolling and loss of breath its like a mini stroke but not a stroke cus babies dont have sweat glands they cant sweat to cool them down so get over heated
Sounds like my nephew. It could be a number of things that might be bothering him. My sister has autism and when she was little she would cry a lot too so my mom took her to the doctors and it turned out that she had problems with her ears so they had to put tubes inside them but they still hurt from time to time. I'm not sure what it is exactly but either way I do think he should be taken to a pediatrician for a checkup.