"What kind of pain is it?" Wang Yao asked.
"It comes intermittently. It is a prickling pain," the man said.
"How long has it been bothering you?" Wang Yao asked.
After thinking a moment, the man said, "Well, it's been six or seven days."
Wang Yao took a closer look at the man. His complexion was not particularly good. He had heavy eye bags, which was a sign of poor rest. "How have you been sleeping?"
"Well, these days I have been busy with work, so I don't get to bed until after 11 p.m.," the man said.
"How long has that been going on?" Wang Yao asked.
"Well, it's been almost half a month," the man said.
"That is actually quite a long time," Wang Yao replied.
After 11 p.m., most of the body entered a state of rest. Once that happened, a person needed sleep to ensure their body got enough rest. Constantly staying up late was harmful to the body.
