What Causes Nosebleeds—and When Should You Worry?

Nosebleeds are common and, in most cases, harmless. They can happen to children and adults alike and often start unexpectedly. While many nosebleeds can be managed at home, some may signal an underlying condition that should be evaluated by an ENT.

Understanding the causes of nosebleeds—and knowing when to seek care—can help you stay safe and avoid unnecessary concern.

Common Causes of Nosebleeds

Most nosebleeds occur when the small blood vessels inside the nose break. These vessels are delicate and can bleed easily, especially when irritated or dry.

Dry Air

Low humidity, especially during winter months or in dry climates, can dry out the nasal lining, making it more likely to crack and bleed.

Nose Picking or Trauma

Even minor trauma—such as nose picking, frequent blowing, or bumping the nose—can injure sensitive blood vessels.

Colds, Allergies, and Sinus Infections

Inflammation from illness or allergies can irritate the nasal lining. Frequent sneezing and blowing increase the risk of bleeding.

Medications

Certain medications can increase bleeding risk, including:

Blood thinners (such as aspirin or anticoagulants)
Nasal steroid sprays if used incorrectly
Some over-the-counter pain relievers

High Blood Pressure

While not a direct cause, uncontrolled high blood pressure can make nosebleeds harder to stop.

Structural or Anatomical Issues

A deviated septum, nasal polyps, or previous nasal surgery may increase the likelihood of recurrent nosebleeds.

Less Common but Serious Causes

Although rare, frequent or severe nosebleeds can be linked to more serious conditions, such as:

Blood clotting disorders
Nasal or sinus tumors
Chronic liver or kidney disease
Significant facial or nasal injury

Dr. Lapco can help determine whether further testing or treatment is needed. Call us today at 954-942-6868 or visit our site at DrLapco.com for more information.