The main reasons for nosebleeds in hot weather are as follows: 1. Hot and dry weather in summer may cause dryness of the mucous membrane in the nasal cavity and rupture of capillaries leading to nosebleeds. Dry weather causes evaporation of liquid in the nasal cavity, dehydration, dryness and itchiness in the nasal cavity, which may easily lead to nosebleeds; 2. Hot weather in summer may easily lead to bad mood and ups and downs of patients, which may also affect the flow of blood vessels in the blood. Sometimes slow, sometimes fast, also easy to cause blood vessel rupture resulting in nosebleeds; 3, and bad habits, such as often rubbing the nose, causing capillary rupture will also cause nosebleeds. There is no need to be nervous when there is a nosebleed situation, use both hands to first pinch the nose, pinch the nose for a few minutes or shoot the forehead with cool water. Nosebleeds often before going to bed at night to see if the wound grows well, it is best to apply erythromycin or gentamycin eye ointment, once a day at night, for about 2 weeks to let the wound grow well, but also not easy to nosebleeds, nosebleeds is the main thing is not often to rub.