After Tang Ye entered, he checked Murong Muyu's physical condition, which certainly involved touching and pinching. Because of her severe illness, Murong Muyu saw things hazily and perceived double shadows, so she thought a doctor was performing surgery on her. She didn't realize it was just Tang Ye until he spoke.
After examining Murong Muyu, Tang Ye found that although her pulse was normal, her internal breathing seemed to be obstructed. It was as if her heart was beating, transporting blood and nutrients to maintain the body's circulation; the source of life force was fine, but somewhere along the way, this circulation was suddenly blocked. Moreover, the site of obstruction was not fixed; it kept changing.