Nasal bleeding in middle-aged and elderly people is mainly related to vascular hardening and hypertension. The blood vessels in the nasal cavity of the elderly are not flexible enough, so when the blood pressure rises and before the cerebral blood vessels rupture, a blood vessel in the nasal cavity will burst and cause nosebleeds. In addition to bleeding from the nostrils, some blood will also flow into the pharynx and be spit out from the mouth. In this situation...