- Picking the inside of your nose - especially if this is done often, if the fingernails are long, and if the inside of the nose is already irritated or tender.
- A knock or blow to the nose - could damage the delicate blood vessels of the mucous membrane.
- Fracture of the nasal bones.
- Deviated septum - when the wall separating the two nostrils is off center, or deviated.
- Climate - hot climates with low humidity or changes from bitter cold to warm, dry climates can cause drying and cracking inside the nose, which can lead to a nosebleed.
- High altitude - as altitude increases, the availability of oxygen decreases, making the air thinner and drier. The dryness could cause the nose to bleed.
- Nasal allergies.
- Excessive use of certain kinds of medications, such as anticoagulants (blood thinners) or non-steroidal anti-inflammatory drugs (NSAIDs) like Ibuprofen.
- Liver disease can interfere with blood clotting and result in frequent and/or severe nosebleeds.
- Excessive use of illegal drugs, such as cocaine.
- Hypertension - commonly seen in old age.
- Heart diseases.
- Acute sinusitis.
- Acute general infections like typhoid, pneumonia, malaria, dengue fever, measles etc.
- Any growth in the nasal cavity, like polyps, benign or malignant tumors.
- Analysis of blood coagulation parameters.
- Measurement of the blood pressure and x-rays of the skull and the sinuses may be necessary.
- Gently squeeze the soft part of your nose together.
- Breath through your mouth.
- Keep your nostrils squeezed for 10 minutes.
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