Why do I get nosebleeds so often?!

What causes nosebleeds?

The most common causes are dryness (often caused by indoor heat in the winter) and nose picking. These 2 things work together -- nose picking occurs more often when mucus in the nose is dry and crusty.

Other, less common, causes include injuries, colds, allergies or cocaine use. Children may stick small objects up the nose. Older people may have atherosclerosis (which is the hardening of the arteries), infections, high blood pressure and blood clotting disorders, or they may be taking drugs that interfere with blood clotting, such as aspirin. Sometimes, the cause of nosebleeds can't be determined.
Nosebleed Prevention
Most nosebleeds occur during the winter in cold, dry climates. If a person is prone to nosebleeds, use a humidifier in the home. Petroleum jelly (Vaseline), antibiotic ointment, or a saline nasal spray also may be used to keep the nasal passages moist.
Try not to pick or blow the nose too vigorously.
Quit smoking. Smoking dries out your nose and also irritates it.
Open your mouth when you sneeze.

it can be numerous things that cause nosebleeds.

Weak membranes
Weather changes
Picking your nose

If they're a regular thing, you probably need to see a doctor.

Weak blood vessels can be strengthened with citrus bioflavonoids found in citrus fruit.

Web search for "citrus bioflavonoids" + "nose bleeding"