The most common cause of nosebleeds is dry air. Dry air can be caused by hot, low-humidity climates or heated indoor air. Both environments cause the nasal membrane (the delicate tissue inside your nose) to dry out and become crusty or cracked and more likely to bleed when rubbed or picked or when blowing your nose.

Is it bad if your nose bleeds?

Usually, a nosebleed is not serious. The nose has many blood vessels in it to help warm and humidify the air you breathe. These vessels lie close to the surface, making them easy to injure — which can cause a nosebleed. Sometimes, though, nosebleeds are more serious.

Is it normal to have nosebleeds for no reason?

When an adult has a nosebleed for no apparent reason, it could be related to medications, health conditions, or simply dry air. Nosebleeds are common, and while the cause may be unclear at first, most cases are minor and can be managed from home.