When our 2 of our 3 were in Iraq, they spent about 7-10 days in Kuwait on their way out, then couldn’t take leave for another 5 or 6 days, after returning to CA. It was long enough for them to adjust to sleeping without their weapons, at least.
Saw the same with my son’s unit, but it was longer before and after returning. Once they were back the men had to stay on base for two weeks if I remember correctly... no motorcycles, no automobiles, there might have been some restrictions on alcohol, too. After a month they got a block pass.
After each deployment he did have a hard time sleeping in a bed, but that is to be expected after you had spent the last 10 months sleeping outside in the flea infested sand :-)