6. Deviated Septum
Why It Happens: The septum is the dividing wall between the two nostrils. If it is crooked, as a result of a broken nose or a birth defect, it can cause a narrowing of one, or both, of the nostrils. This can lead to irritations that weaken the nasal membranes and cause nosebleeds.
Additional Info: A deformed septum can allow foreign objects, like dust, pollen or chemicals, to lodge in the nose and set up an infection, leading to nosebleeds.
What To Do: If you have a crooked nose, it’s important to keep it clean. Swimming in non-chlorinated water regularly can help, as can sniffing up cold salt water into the nostrils on a regular basis.