The temperature of the blood flowing from the nose is similar to the human body temperature, and when it enters the inside of the nasal cavity, the patient will feel a hot flow coming out of the nasal cavity because the temperature inside the nasal cavity is slightly lower, which is the manifestation of the patient’s hot nosebleed. Generally, patients with hot nosebleeds have the following clinical reasons: the first reason is that the dry weather and the dryness of the patient’s nasal cavity have led to arterial bleeding inside the nasal cavity induced by erosion and ulceration of the nasal mucosa, thus manifesting as hot nosebleeds, which are mainly arterial rather than venous bleeding. The second reason is that some patients may suffer from rupture and bleeding of the arterial blood vessels of the nasal mucosa due to fire or frequent touching, picking or rubbing of the nose. The third cause is seen in middle-aged and elderly patients who have a history of hypertension and poor blood pressure control. When the patient exercises excessively or bends over or lowers his head, the local blood pressure increases, resulting in the rupture of the arterial blood vessel wall and the manifestation of hot nosebleed.