The lining of your nose contains many tiny blood vessels that lie close to the surface and are easily irritated.

The two most common causes of nosebleeds are:

  1. Dry air — when your nasal membranes dry out, they're more susceptible to bleeding and infections
  2. Nose picking

Other causes of nosebleeds include:

  1. Acute sinusitis (nasal and sinus infection)
  2. Allergies
  3. Aspirin use
  4. Bleeding disorders, such as hemophilia
  5. Blood thinners (anticoagulants), such as warfarin and heparin
  6. Chemical irritants, such as ammonia
  7. Chronic sinusitis
  8. Cocaine use
  9. Common cold
  10. Deviated septum
  11. Foreign body in the nose
  12. Nasal sprays, such as those used to treat allergies, if used frequently
  13. Nonallergic rhinitis (chronic congestion or sneezing not related to allergies)
  14. Trauma to the nose

Less common causes of nosebleeds include:

  1. Alcohol use
  2. Hereditary hemorrhagic telangiectasia
  3. Immune thrombocytopenia (ITP)
  4. Leukemia
  5. Nasal and paranasal tumors
  6. Nasal polyps
  7. Nasal surgery

In general, nosebleeds are not a symptom or result of high blood pressure.

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Sept. 26, 2020

See also

  1. Medication-free hypertension control
  2. 7 signs to watch for if you have ITP
  3. Acute lymphocytic leukemia
  4. Acute myelogenous leukemia
  5. Alcohol: Does it affect blood pressure?
  6. Alpha blockers
  7. Angiotensin-converting enzyme (ACE) inhibitors
  8. Angiotensin II receptor blockers
  9. Anxiety: A cause of high blood pressure?
  10. Aplastic anemia
  11. Aspergillosis
  12. Beta blockers
  13. Beta blockers: Do they cause weight gain?
  14. Beta blockers: How do they affect exercise?
  15. Blood pressure: Can it be higher in one arm?
  16. Blood pressure chart
  17. Blood pressure cuff: Does size matter?
  18. Blood pressure: Does it have a daily pattern?
  19. Blood pressure: Is it affected by cold weather?
  20. Blood pressure medication: Still necessary if I lose weight?
  21. Blood pressure medications: Can they raise my triglycerides?
  22. Blood pressure readings: Why higher at home?
  23. Blood pressure tip: Get more potassium
  24. Blood pressure tip: Get off the couch
  25. Blood pressure tip: Know alcohol limits
  26. Blood pressure tip: Stress out no more
  27. Blood pressure tip: Watch the caffeine
  28. Blood pressure tip: Watch your weight
  29. Broken nose
  30. Caffeine and hypertension
  31. Calcium channel blockers
  32. Calcium supplements: Do they interfere with blood pressure drugs?
  33. Can low vitamin D cause high blood pressure?
  34. Can whole-grain foods lower blood pressure?
  35. Central-acting agents
  36. Choosing blood pressure medications
  37. Coarctation of the aorta
  38. Deviated septum
  39. Diuretics
  40. Diuretics: A cause of low potassium?
  41. Do you know your blood pressure?
  42. Essential thrombocythemia
  43. High blood pressure and exercise
  44. Free blood pressure machines: Are they accurate?
  45. Gaucher disease
  46. Home blood pressure monitoring
  47. Granulomatosis with polyangiitis
  48. Hemolytic uremic syndrome (HUS)
  49. Hemophilia
  50. High blood pressure (hypertension)
  51. High blood pressure and cold remedies: Which are safe?
  52. High blood pressure and sex
  53. High blood pressure: Can you prevent it?
  54. High blood pressure dangers
  55. Hypertensive crisis: What are the symptoms?
  56. Immune thrombocytopenia (ITP)
  57. Isolated systolic hypertension: A health concern?
  58. ITP and pregnancy: Is it safe?
  59. ITP in children: How can I protect my child from complications?
  60. L-arginine: Does it lower blood pressure?
  61. Medications and supplements that can raise your blood pressure
  62. Menopause and high blood pressure: What's the connection?
  63. Plague
  64. Pulse pressure: An indicator of heart health?
  65. Resperate: Can it help reduce blood pressure?
  66. Sleep deprivation: A cause of high blood pressure?
  67. Staying healthy after your spleen has been removed
  68. Stress and high blood pressure
  69. Understanding immune thrombocytopenia (ITP)
  70. Understanding your ITP treatment options
  71. Vasodilators
  72. How to measure blood pressure using a manual monitor
  73. How to measure blood pressure using an automatic monitor
  74. What is blood pressure?
  75. Von Willebrand disease
  76. Weightlifting: Bad for your blood pressure?
  77. What is immune thrombocytopenia (ITP)?
  78. What's your high blood pressure risk?
  79. White coat hypertension
  80. Wrist blood pressure monitors: Are they accurate?