Patient's question:
The son often gets nosebleeds. He gets nosebleeds when he yawns in the morning, and also when the weather is too hot. He was seen in Shaoguan.Doctor's answer:
Nosebleed, medically known as "epistaxis," is often caused by "lung dryness and blood heat," leading to dry nasal passages and insufficient tensile strength of capillaries, resulting in rupture. If not treated promptly, it may progress to severe consequences, such as atrophic nasal mucosa, anemia, memory loss, poor vision, weakened immunity, and even ischemic shock, which can be life-threatening.Children are active and prone to accidentally injuring their noses, which can cause nosebleeds. Additionally, they may insert foreign objects into their nostrils out of curiosity, damaging the nasal mucosa. These situations can occur at any time, and the amount of blood lost is usually small, so there is no need for excessive concern.
As for why nosebleeds are particularly severe in winter, it is mainly because in cold weather, we tend to eat warm foods, and the steam released during eating accelerates blood flow in the nasal passages. If the nasal mucosa is naturally thin or has been previously injured, it is more prone to bleeding. Furthermore, in cold and dry environments, more blood flows through the nasal passages to maintain temperature and humidity, causing the capillaries to become congested and leading to nosebleeds.