Nosebleed is not a typical plateau reaction, but some patients may have nosebleed after entering plateau. The climate in the plateau area is relatively dry, and the oxygen content is also relatively thin, part of the population after entering the plateau area, because of the dry climate will lead to rupture of the nasal mucosa blood vessels, thus appearing nosebleeds. There are also some patients who have elevated blood pressure due to plateau reaction, which, together with the dry climate, can lead to nosebleeds. The most common cause of plateau reaction is hypoxia. Patients with plateau reaction will usually experience dizziness, fatigue, headache, nausea, vomiting and other discomforts, and some of the patients may also experience symptoms such as chest tightness, panic, shortness of breath, rapid heartbeat, blue and purple lips or fingernails, and the symptoms will be more pronounced after the activity. Nosebleeds in the plateau, pay attention to keep the nasal cavity moist and replenish water, if the patient’s symptoms of plateau reaction is relatively mild, can be without special treatment, oxygen can relieve most of the discomfort symptoms. If the patient’s plateau reaction is more serious, then need to pay attention to, if necessary, go to the hospital in time to receive treatment.