What causes nosebleeds after returning from high altitudes?
Disease description:
Yesterday, while cycling around Qinghai Lake, I experienced mild altitude sickness with symptoms including chest tightness, shortness of breath, and headache. After returning from the high altitude, I started having nosebleeds. What could be the reason?
Doctor's answer (1)
Dr. Xu Gang
Nosebleeds after returning from high altitudes are caused by altitude sickness. Because the climate in high-altitude regions differs significantly from that of lowland areas, conditions on the plateau are typically extremely dry and the air is very thin, resulting in minimal precipitation. Consequently, when people suddenly arrive at high altitudes, many experience altitude sickness, such as shortness of breath.
