Nose bleeding is not alarming especially if you are living is a hot, dry and low-humid region. The nasal membranes are quite delicate and often become very dry. When picking or blowing nose the blood vessels rupture causing abrupt nose bleed. Sometimes nose bleeding begins without any cause. You can prevent nose bleeding by - Moisturize the insides of your nose - Avoid smoking - Install a humidifier - Use saline nasal sprays - Avoid picking nose You can stop nose bleeding by - Sit straight - Do not lie down - Bend a little forward to prevent aspiration - Breath through your mouth and pinch your nostrils together to close the nasal cavity