Malaria and other fevers are a common disease in northeastern provinces of Cambodia. Indigenous Peoples, including the Bunong, who live near the jungle are most vulnerable to malaria. So, they plant herb trees at home. They put phonleay leaf, orange leaf, and treang khet leaf in a pot and boil them together. Some add lemon grass, too. Patients with high fever take it in boiled water 3 to 4 times a day. Within a few days, the symptoms become better.