Trigger thumb, medically known as stenosing tenosynovitis, is a condition in which your thumb catches in a bent position, then straightens abruptly, sometimes with a snap.

Parenting offers very few certainties. However, one thing you can count on is that your child will at some point experience pain in the buttocks. The causes may range from diaper rash in infants to skateboarding accidents in adolescents.

Intestinal mucus is a thick, slimy substance produced in the mucous membranes of your colon, or large intestine. It helps protect your intestinal walls against pathogens and damage from food and wastes that pass through your digestive tract.

Your bone density is directly correlated to your body fat, so if you're very slender or exercise too much, your bones may suffer. Girls and young women are susceptible to the "female athlete triad" – a combination of inadequate nutrition, hormone disruption and low bone density.

Your kidneys are paired organs that keep your blood chemically clean and balanced. Each day, they sift water and waste from about 200 quarts of blood, according to the National Kidney and Urologic Diseases Information Clearinghouse.

Herbal medicine has been around for centuries, and despite the success of modern medicine, plants are still frequently used in the home treatment of a variety of ailments. Flowers from the linden tree, commonly known as the lime or basswood tree, is one such traditional folk medicine.

The ideal weight for a woman of any age depends primarily on her body’s Body Mass Index, suggests the Centers for Disease Control and Prevention. BMI is a screening tool used to calculate the amount of fat an individual has in her body.

The National Organization for Reform of Marijuana Laws reports, "marijuana is the third most popular drug in America, behind alcohol and tobacco, and has been used by nearly 100 million Americans."

Medical treatment for chemical scalp burns can vary widely depending on the offending chemical. If you've been burned by a hair-care product such as a dye or a bleaching agent, you can most likely treat the area with the first-aid methods described below.

Good posture is a combination of balanced strength and flexibility in the skeletal muscles, enabling people to walk, sit or stand in a graceful manner. Conscious activation of the postural muscles is important, especially when sitting or standing for long periods of time.

While neck and shoulder pain can occur due to traumatic injuries or bone degeneration, muscle strain represents the main cause. The Cleveland Clinic notes that these soft-tissue injuries can happen all at once or can come on gradually, such as when they are caused by habitually poor posture.

Most often found on the chest, hips, thighs, buttocks and flanks, stretch marks are just as common in men as they are in women. Both genders get stretch marks for the same reasons, and -- unless caused by an infection -- they are usually permanent.