he may be at the separation anxiety stage. my youngest had real issues with that and, i seem to remember, that around 9 months can be the start point. he also could have an ear infection. i would check that first (though, i would think that he would make up in the night if that were the case). if it's not the ears, then maybe try to alter your bedtime routine. a little longer one-on-one reading, rocking, what-have-you. then lay him down and tell him you'll be right back. then leave the room. if he cries, come back in and lay him back down (don't pick him up) and tell him you'll see him in the morning. they just have to learn that you WILL come back. another option, though, may also be food or naps. if he's taking 2 naps, experiment with just 1. if taking 1, try 2. babies sleep needs just change. (my youngest went from sleeping 20 hours a day, to 8 hours overnight.) and maybe he's still hungry. both my boys would go (and still go) through periods when they are just hungrier than usual. just try some rice cereal, before the final breast feeding. and, finally, (i'm just trying to think of anything it could be) it could be gas. at that age, at lot of new foods are being introduced. try just feeding him 1 thing for 2 days (carrots, milk, rice cereal, then peas, milk, and rice cereal). then you can isolate any problem foods. sorry to be so scattered. hope that helps!