what causes nosebleeds
Known causes of nosebleeds. 1  Infection in the nasal membranes. 2  Nose picking. 3  Respiratory infections. 4  Trauma. 5  Allergies and hay fever. 6  Foreign objects in the nose (usually seen in children). 7  High blood pressure. 8  Constipation causing straining. 9  Medicines such as the âblood thinnersâ (e.g. warfarin).
While the cause may be unclear at first, most cases when the nose bleeds are minor can be managed from home. Immediate causes of nose bleed include trauma to the nose from an injury, deformities inside the nose, inflammation in the nose, or in rare cases, intranasal tumors. Any of these conditions can cause the surface blood vessels in the nose to bleed. When you have a nosebleed for no reason, the cause of your bloody nose may seem mysterious or scary, but it's probably not.