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Read time: 6 min
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Posted on:
Read time: 6 min
Posted on:
The link between allergies and nosebleeds isn’t obvious at first blush. After all, not all nose bleeds are the result of an overactive immune system.
However, as you will discover in this post, there are links between them, something that several studies now confirm.
Allergies occur when your immune system reacts to foreign substances entering your body that most people don’t respond to. Common allergens include pet dander, pollen, and bee venom.
When your immune system detects these substances, it begins to manufacture antibodies. These travel to the site in contact with the allergen, usually the nasal lining or sinuses, leading to inflammation, swelling, and itchiness.
The severity of allergies differs considerably between people. Some hardly know they have one, while others can develop anaphylaxis, a life-threatening condition where the airways narrow and stop them from breathing.
Nosebleeds occur when the capillaries under the nasal membrane rupture and blood starts trickling out. They typically occur because of stress, high blood pressure, and trauma (that is, people picking or rubbing their noses). However, allergies may play a significant role, too.
Here are some of the reasons allergies may lead to a higher incidence of nosebleeds.
Dry nasal passages are a common allergy symptom. In the presence of allergens, the nose ceases making sufficient mucus to keep its interior lining moist, making it weaker and more prone to bleeding. As blood vessels under the nose’s surface open up, it increases the likelihood of a nosebleed even more.
Doctors often prescribe patients nasal steroid sprays for common allergens. These help to calm the immune response in the nasal cavity, reducing swelling and post nasal drip. However, steroid sprays may also increase the chance of developing nosebleeds.
Sprays may contain ingredients that irritate the nose. Usually, the irritation is mild but can be severe in a subset of patients. Nosebleeds are a common side effect as the nasal lining becomes damaged.
The “allergic salute,” also known as nasal rubbing, is a common problem that occurs among recurrent allergy patients. People with uncomfortable allergy symptoms rub their noses, damaging the sensitive lining of their nostrils and causing blood vessels under the surface to burst through the skin, leading to a nosebleed.
If you already have a nosebleed:
The bleeding should stop in around fifteen minutes or so. If it doesn’t, you may require medical attention.
While trying to fix your nosebleed, stay calm. The more stressed you feel, the higher your blood pressure will rise, and the longer it will take for the bleeding to stop.
To reduce your risk of developing an allergy-related nosebleed, you should:
Most nosebleeds, including those that follow allergies, are nothing to worry about. They typically occur in people who have a genetic propensity to develop them. Bleeding should stop within 15 minutes.
If you have health conditions besides allergies, then nose bleeds may be more serious and you could require medical help. Patients taking blood-thinning medications, such as warfarin or aspirin, for instance, may bleed more easily and for longer than normal.
If you are taking either of these drugs, you may not be able to stop the bleeding by yourself. Blood may not contain enough clotting factors to form a seal by itself.
In these cases, get medical help. Doctors will place packing materials in your nose to stem the bleeding. These absorb blood and help scabs to form naturally.
In some rare cases, bleeding disorders can cause nosebleeds. Again, blood may not clot properly, meaning that you can’t stop the bleeding, even if the damage is small.
If you know you have a bleeding disorder, go to the emergency room immediately. Do not attempt to drive there yourself.
If you have an allergy and you believe that it is causing nose bleeds, get help from an online doctor today. These professionals can consult with you about your symptoms and whether your nose bleeds relate to preexisting conditions, personal habits, or the medications you are currently taking.
Content on the DrHouse website is written by our medical content team and reviewed by qualified MDs, PhDs, NPs, and PharmDs. We follow strict content creation guidelines to ensure accurate medical information. However, this content is for informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment. For more information read our medical disclaimer.
Always consult with your physician or other qualified health providers about medical concerns. Never disregard professional medical advice or delay seeking it based on what you read on this website.
If you are experiencing high fever (>103F/39.4C), shortness of breath, difficulty breathing, chest pain, heart palpitations, abnormal bruising, abnormal bleeding, extreme fatigue, dizziness, new weakness or paralysis, difficulty with speech, confusion, extreme pain in any body part, or inability to remain hydrated or keep down fluids or feel you may have any other life-threatening condition, please go to the emergency department or call 911 immediately.
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