How can nosebleeds be prevented?

Limit activity for a day or two. Vigorous exercise can cause nosebleeds to recur, so it is best to refrain from vigorous activity for a day or two after a nosebleed.

Keep the inside of the nose lubricated. A little dab of petroleum jelly placed over the irritated area on the inside of the nose for a few days may help prevent bleeding.

Keep the moist membranes of the nose from drying out. Invest in a humidifier. Since one of the most common causes of nosebleeds is dryness of the moist membranes that line the nose, breathing well-humidified air may help protect against some nosebleeds. Saline nose spray can also help keep the membranes moist.

Avoid trauma to the nose. Blow gently. Keep objects out of the nose.

Minimize nasal discharge. Antihistamines can reduce nasal discharge from allergies. Make sure your blood pressure is normal. High blood pressure can increase the chance of having a nosebleed.