It might be time to cut out the daytime naps if he still takes any, and if not, you may want to have a sleep study done on him. I'm having the same problem with my daughter who is three-we're going next week to St. Vincent's Rehabilitation Center. The number is ###-###-#### for the pediatric sleep disorders center and the email is ____@____.com
I would suggest getting a baby gate and putting that on his room. That's what I've had to do with my daughter. Did you recently take him out of his crib or has he been in the toddler bed for a while? Did he start doing this right after you switched him from the crib? If so, maybe he wasn't ready for the freedom of a toddler bed yet.
The only other suggestion I can offer is for you to sit on his bed with him until he falls asleep, stroking his hair, singing to him or putting on a nighttime cd. Or you could offer to let him look at books while he's laying down-I do that with my daughter and she will fall asleep "reading" to herself.
I have to lay down with my daughter most nights until she falls asleep-or else I leave a small sippy cup of water next to her bed and put the gate up, and she will eventually fall asleep, either in her bed or on the floor next to the gate and then I will go put her in bed once she's sound asleep.
I hope that something I've offered will be of help to you. I know how exhausting it can be. Take care and God bless.
Happy Valentine's Day! :)
~N.