Hello, after reading your description, hip lift pants are not suitable for hip lift. Large flat buttocks can be improved by injecting autologous fat. Usually, the fat in the lower buttock and thigh root is sucked out to form an obvious buttock lifting line, and then the sucked fat is injected into the depression of the upper buttock, so that the ideal buttock can be shaped. It is recommended to go to the plastic surgery department of a large public 3A hospital for high safety.