Nosebleeds may occur because the weather is too hot, mainly due to the dryness of the mucous membrane, the capillaries are prominent and exposed, and the epithelial tissue is brittle and ruptured, resulting in nosebleeds. Too hot weather can lead to a large amount of body water evaporation loss, further causing the nasal mucosa dry, while the weather is too hot to make the body blood flow faster, higher blood pressure, easy to make the capillary rupture, ultimately leading to nosebleeds. Of course, the cause of nosebleeds is not only the weather, but also may be accompanied by local diseases such as deviated nasal septum, allergic rhinitis, dry rhinitis, atrophic rhinitis, or systemic causes such as high blood pressure and coagulation dysfunction. When nosebleeds occur in hot weather, it is recommended to increase the humidity of the air, and actively consult a doctor for a systematic examination to clarify the cause and provide targeted treatment.