Why do I get nosbleeds often does anyone knows

I nosebleed for about 2-3 times a week, and my friends have told me is a sign of weakness but I don't think so because I exercise normally I lift a lot of weights and I eat right and no I don't pick my nose in case you wonder, Is it bad to bleed often, is it serious?can someone let me know?

A nosebleed, medically known as epistaxis, is the relatively common occurrence of hemorrhage (bleeding) from the nose, usually noticed when it drains out through the nostrils. There are two types: anterior (the most common), and posterior (less common, and more severe).

All nosebleeds are due to tears in the mucosal lining and the many small blood vessels it contains. Fragility or injury may cause the tears, while inflammation, coagulation problems and other disorders may make the injury harder to repair.

The cause of nosebleeds can generally be divided into two categories, local and systematic factors.

Local factors:

Anatomic deformities

Chemical inhalant

Inflammatory reaction (eg. acute respiratory tract infections, chronic sinusitis, allergic rhinitis and environmental irritants)

Foreign bodies

Intranasal tumors (Nasopharyngeal carcinoma in adult and juvenile angiofibroma in adolescent males)

Nasal prong O2锛?continuous positive airway pressure therapy

Nasal spray

Surgery (such as septoplasty and endoscpoic sinus surgery)

Trauma

Systemic factors: