Get up in the morning and spit out phlegm and blood (nose and booger are the same). What's the problem?

In winter, the air is dry and the human body is short of water, which will reduce the blood supply of some superficial small blood vessels. At the same time, due to the cold weather, the brittleness of capillaries increases and becomes easy to break. Like the nasal cavity, it is the first point where cold air enters the body. The mucous membrane in the nasal cavity is stimulated the most, and its capillaries are more likely to rupture. So, put the paper in and come out with a bloody nose. At night, the temperature is lower, people don't drink water all night, and the human body is even more short of water. After the capillaries burst, the blood reached the throat and coughed in the morning.

Therefore, it is necessary to maintain a certain humidity indoors in winter (put a bucket of water or humidifier) and drink plenty of water at ordinary times. If there is inflammation in the nasal cavity, it is best to see a rhinologist and use some anti-inflammatory drugs (preferably local) and capillary constrictors.