Chen Ge could not understand Doctor Gao's message. "How could washing one's hair be related to a self-defense mechanism?"
"PSTD presupposes an earlier trauma. Men Nan repeatedly washing his hair is probably to escape from a psychological trauma; this perhaps has to do with his past."
"His past?"
"Yes, something he has experienced in the past has left a great trauma in him. Whenever he is reminded of it, his body reacts. To ease the pain, he instinctively seeks out a method to make himself feel better. Based on my observation, that method is to wash his hair."
After a while, Doctor Gao sent another message. "At the beginning of the semester, I once asked Men Nan why he chose to study psychology. He told me that he wished to cure someone's illness, and I now realize that he was probably talking about himself."
