CAUSE 1 - NOSE PICKING is the MOST COMMON CAUSE of nose bleed in children and adults - NOSE PICKING is most commonly done for removing crusts from nose 

CAUSE 2 - DRY AIR is the also a common cause of nosebleeds - Living in a dry climate can dry out the nasal membranes and causes crusting inside the nose - These crusts bleed when removed

CAUSE 3 - ANTIHISTAMINES and DECONGESTANTS for allergies, colds, or sinus problems can dry out the nasal membranes and cause nosebleeds - eg. Levocetirizine, Pseudoephedrine, etc.

CAUSE 4 -  FREQUENT NOSE BLOWING is another cause of nosebleeds - HARD NOSE BLOWING can also lead to rupture of fragile nasal vessels leading to nose bleed

CAUSE 5 -  FOREIGN BODY stuck inside nose is a very common cause of nosebleeds in children - eg. Pearl bead, Paper piece, Eraser, part of a toy, etc.

CAUSE 6 -  TRAUMA or INJURY to the nose is an important cause of nose bleed - eg. Accident, Assault, fall from height, etc.

CAUSE 7 -  HIGH BLOOD PRESSURE aka HYPERTENSION is a very important cause of frequent nosebleeds in adults and elderly

CAUSE 8 -  BLEEDING DISORDERS can also very frequently causes nosebleeds in patients. - eg. Scurvy (Vitamin C Deficiency), ITP (Idiopathic thrombocytopenic purpura), Aspirin overdose, etc.

CAUSE 9 -  CLOTTING DISORDERS can be a frequent cause of nosebleeds in patients. - eg. Hemophilia A, Hemophilia B, von Willebrand's disease, Vitamin K deficiency, etc.

CAUSE 10 -  CANCER and its TREATMENT  both can cause nosebleeds in patients. - eg. Cancer like Leukemia, Myeloma, etc. - Cancer treatment like Radiotherapy, Anticancer medicines

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