The National Institute of Dental and Craniofacial Research estimates that 500,000 Americans experience their first cold sore every year. For most, the first episode is also the last. A smaller number---between 20 and 40 percent--suffer recurrent episodes.

Ear pain is a hallmark of childhood; almost all children have experienced earaches at one time in their short lives. Some ear pain is the sign of a bacterial infection, while other discomfort may be simply a result of congestion or a change in air pressure.

Although honey is often used as natural treatment for a variety of ailments, some individuals can develop an allergic reaction to it.

Erectile dysfunction, or impotence, is a common disorder in men that has several causes. Vascular disease, which is dysfunction of the blood vessels as in atherosclerosis, is one common cause. Another potential cause is the side effects of particular medications.

According to MedlinePlus, a toothache is generally the result of a dental cavity in which the tooth begins to decay, leading to infection. The cause is most often attributed to poor dental hygiene, although a genetic proclivity to tooth decay can also play a role.

According to the National Institutes of Health (NIH), a rapid pulse or arrhythmia may occur during episodes of anxiety. A normal pulse or heart rate is between 60-100 beats per minute.

Women of all ages have historically used emmenogogues--herbs that stimulate menstrual flow--to regulate the menstrual cycle. Herbal emmenogogues can act as emergency contraceptives or as treatments for oligomenorrhea (light, infrequent menstruation).

Some of the more commonly experienced symptoms of allergies to latex condoms are usually mild. However, repeated exposure to latex--if you are allergic--can lead to a severe and sometimes fatal reaction.

Your calf, or gastrocnemius muscle, can easily become strained during exercise or sports that quickly change direction, such as basketball or tennis.

Bruised tailbones can heal within a few days, but can take as long as a few weeks. Instead of opting out of exercise altogether, you can choose exercises that don't cause pain. Low impact exercise, standing exercises and stretching are all acceptable ways to exercise without exacerbating the area.

The foot has 26 bones, and these bones, along with heredity, determine the width and length of your foot. The bones are connected by tiny muscles and ligaments that hold the bones together and contribute to the strength and flexibility of your foot.

Ringing in the ears, also known as tinnitus, has impacted at least 50 million people in the U.S., according to a report in the August 2010 issue of “American Journal of Medicine.