Minamoto Tamako sprayed nosebleed and knelt on the ground, her pupils dilated, breathing rapidly.
When people overuse their brains, the body enters a stress state, leading to sympathetic nervous system excitation.
Over-excitation of the sympathetic nervous system can cause a series of physiological changes in the body, including elevated blood pressure, which increases the pressure on the small blood vessels in the nasal cavity. The blood vessels in the nasal cavity are abundant, especially in the Li's area at the lower front part of the nasal septum, where the vessels are dense and superficial. When the pressure exceeds their limit, it's easy for the vessels to rupture and bleed.
Minamoto Tamako saw it. Through those seemingly inconspicuous clues, she saw the past of the two people.