Seeing lots of blood pouring out of your nose can be a frightening--and sometimes embarrassing--experience if you’re a teen. But nose bleeds are common in kids and teens, and most are harmless and easy to control, according to Kids Health.

A nose bleed, a condition known as epistaxis, generally happen at the septum, or the part of the nose that separates the nasal chambers. On the whole, nose bleeds are not dangerous, although they may mark a more critical problem such as a head injury.

Many people use cotton applicators to clean the insides of their ears. This is not necessary. In fact, inserting anything into the ear canal to clean your ear can cause major damage, including hearing loss, according to the Hearing Tutor website.

Ear wax serves an important purpose by trapping debris before it can get further into your ear. But when you accumulate too much ear wax, it can cause discomfort and trouble hearing. With a little vinegar and water, you can easily clean out your ears and remove excess wax.

Running is a moderate- to high-intensity activity that requires many systems in the body to work overtime to support the extra energy expenditure. Although this level of exercise has been proven to be better for you than no exercise at all, it may sometimes cause discomfort.

Inner ear circulation refers to the circulation of fluids and blood to the area. A disturbance in the circulation of either can lead to a variety of problems, including dizziness, hearing loss or head noise.

Postnasal drip is mucous that runs from the nose down the back of the throat, often causing a cough, according to the American Academy of Family Physicians. The purpose of mucous is to lubricate and clean nasal passages. Under normal circumstances, the mucous is swallowed without the individual realizing it.

Strep A and strep B, or Streptococcus pyogenes and Streptococcus agalactiae respectively, are closely related microorganisms with several characteristics in common. First, they both produce beta-hemolysis, which means the organisms contain hemolysins, which will lyse red blood cells in agar that contains blood.

Throat dryness can be annoying, particularly if dryness makes swallowing uncomfortable. Dryness in the back of the throat can occur due to allergies, illnesses or reduced moisture in the air.

Hydrogen peroxide provides an effective method of softening ear wax blocking the ear canal. Ear wax is necessary to protect the skin of the ear canal and trap bacteria and dust, but sometimes too much wax is produced.

Your inner ear makes impulses that are sent to your brain where they are recognized as sound. These impulses also control your sense of balance. Conditions that can disrupt these functions include ear infections -- the most common illness among children according to the U.S.

If you have a food sensitivity, you may have symptoms that include a sore throat, chronically stuffy nose or even itchy skin. Gluten, a protein found in particular grains, can cause some or all of these symptoms if you're sensitive to it. Gluten also causes a more serious form of sensitivity called celiac disease.