One of them, the Light of the World camp, is a compound on the banks of the Irrawaddy surrounded by 10-foot high aluminum walls as well as a guard tower. The main gate to the compound locks from the outside. There is no handle on the inside of the gate.
"We need to have the walls," says Zau Tu, a pastor leading the team who was treating at least 18 patients at the camp.
"If they (the patients) can't see anything around them, it calms them down."
For those patients who can't control their urges, there are more drastic measures available, including a cage next to the camp's bamboo chapel.
"If they commit crimes, if they fight each other, they go in the penalty box," says Zau Tu.