Skin color results from the blood flow in the tiny vessels within the skin as well as the amount of pigment present in the dermal layers. Any number of normal conditions can alter the pigmentation of the skin, but only abnormal causes result in bluish discolorations.

A burning sensation accompanied by chest pain can be a symptom of many diseases or conditions. Some may be related to the heart, and others may be caused by the digestive system or neurological responses within the chest cavity.

Chemotherapy is a cancer treatment that is used to destroy cancer cells. The American Cancer Society states that more than 100 different drugs may be used as part of a chemotherapy regimen. The medications are delivered intravenously or taken orally.

Ligaments and tendons are part of the musculoskeletal system, with ligaments attaching bones to bones and tendons muscles to bones.They each serve very important functions to the joints and bones. Ligaments and tendons are made of dense layered collagen fibers, called fibrous connective tissue.

Vicks produces a line of humidifiers designed to treat the air in uncomfortably dry environments; these devices are also capable of filling a room with medicinal vapors that may soothe the symptoms of a cold, flu or allergies.

Salicylic acid is a type of beta-hydroxy acid derived from willow bark. A natural exfoliant, the acid is commonly used in topical treatments for aging, sun-damaged skin and acne-prone skin.

According to the National Institute on Drug Abuse, nicotine is one of the mostly widely addictive drugs used in the United States. Nicotine, which is a naturally occurring chemical compound found in plants, such as tobacco, was once used in insecticides. Inhaled during smoking, it has an immediate effect on the body.

A Pap smear is a gynecological test used to evaluate cervical cells in women. During this cervical cancer screening test, which is also called a Pap test, a small number of cells are removed from your cervix using a tiny brush. These cells are then examined in a laboratory for any type of abnormalities.

Mono, which is more formally referred to as mononucleosis, is an infectious disease caused by exposure to the Epstein-Barr virus, or EBV.

If you have a congested cough, also known as a wet cough, seek relief in natural expectorants. These substances thin out and break up the mucus stuck in your lungs, making it easier to breathe and your cough more productive. Remember to spit out any mucus that's dislodged, rather than swallowing it.

When a person's body attacks its own cells or organs because it can not identify these as part of the body, he is said to have an autoimmune disorder.

Dopamine is a neurotransmitter that helps us feel pleasure and stay motivated. A lack of dopamine is also central to the development of Parkinson’s Disease and restless leg syndrome.