I notice that with DS, even though he gets about 9 hours of sleep each night, it's not a restful sleep. In his case it's his sinuses. Sometimes he's able to breathe thru his nose, other times, not so much, so he'll snore, breathe heavily, thrash around. Supposed to go see an ENT in the coming months to see if it's polyps, inflammation... Tends to be worse during Tobi months.