My 3 yo holds his breath throughout the day. He'll breathe in (short), hold it for 3-7 seconds, then breathe out (short) and repeat that frequently. He does this when he's awake, but probably not conscious of what he's doing, like when he's watching TV. At night, when he's asleep, he doesn't hold his breath at all, he breathes normally, though his breathing seems a little short.
Could this be related to asthma?
We're scheduled to take him in to a breathing specialist to get it checked out in the next few weeks, but I was wondering if anyone else has encountered this before.