Postnasal drip is responsible for 50 percent of lingering coughs that last more than three weeks, according to "Kelley's Essentials of Internal Medicine."

If you suffer from rosacea, you are not alone – an estimated 16 million Americans experience this skin condition. Since there is no known cure, the goal in treating rosacea is identifying triggers for flare-ups. Triggers vary from person to person.

Muscle pain can stop you in your tracks. But is it a cramp or a pulled muscle that's bothering you? Though the terms are often used interchangeably, they are not the same thing.

If you're experiencing side pain after exercise, rest assured it's quite common, although it can have many different causes, such as a side stitch or delayed-onset muscle soreness. You might also be suffering from gastrointestinal symptoms brought on by your exercise.

If you have been moving your fingers repetitively, it is normal to feel some pain when you stretch your hands, but if the pain is severe and happens frequently, consult a health care professional.

Oxidation is a chemical process that, loosely defined, involves removing electrons from particular areas of a molecule. In biochemical processes, oxidation generally results in the release of energy. As such, when you "burn"

Several serious medical conditions can restrict circulation to the head, both during sleep and waking hours. Thankfully, many of these problems can be treated to help restore blood flow to the brain while sleeping.

Nerve pain is generally caused when the nerves of the peripheral nervous system are damaged, which is referred to as neuropathy. This damage may be caused by toxin exposure, infections and traumatic injury. Some common symptoms of neuropathy may include nerve pain and numbness.

Bone loss in the jaw bone can cause the teeth to become loosened or even fall out. Bone loss around the teeth is usually caused by periodontal disease. One of the difficulties in treating bone loss around the teeth is that the bone loss cannot be reversed, although new bone can be grafted in.

Acute renal failure involves the sudden loss in the kidney’s capacity to function, according to MayoClinic.com. The kidney is a vital organ that filters excess electrolytes and waste materials out of the bloodstream.

The CDC estimates that 1 in 5 adults in the United States, or 46 million people, suffer from some form of arthritis, a group of diseases that includes osteoarthritis, rheumatoid arthritis, gout and lupus.

Fingernail strength -- like hair thickness, skin tone, and shoe size -- is subject to a lot of normal variation. If you're a healthy person with no obvious nutritional deficiencies, research suggests that vitamins are unlikely to help strengthen your nails.