Nosebleeds in the third trimester of pregnancy are clinically characterized by the following conditions: the first condition is that during the first trimester of a pregnant woman’s pregnancy, the level of progesterone in the body increases, leading to the dilation of blood vessels, especially in the nasal cavity, which results in the thinning of the blood vessel walls. At the same time, the blood flow of the whole body increases after pregnancy, these two reasons together can easily induce the nasal cavity blood vessel rupture bleeding. Especially in the pregnant woman suddenly turn over under the activities, more likely to induce blood vessel rupture bleeding. The second situation is that some pregnant women in the first trimester of pregnancy, the mood may be more nervous, easy to fire, sleep at night is not good rest, easy to lead to nasal mucosa dry. After the nasal mucosa is dry, it is easy to induce localized erosion and ulceration of the mucosa, which is prone to nasal bleeding. For nasal bleeding in the first trimester of pregnancy, it is recommended that pregnant women avoid fire and keep the nasal cavity moist, and saline drops can be used in the nasal cavity under the guidance of the doctor. It is recommended to eat more vegetables and fruits, avoid strenuous activities, and avoid touching and blowing the nose.