The flu, also called influenza, is a contagious upper-respiratory virus that causes fever, chills, body aches, nasal congestion, dry cough and fatigue. Stay home, rest and avoid contact with others when you have the flu, advises the Centers for Disease Control and Prevention.

Whether eating sugary food or just plain bread, the body breaks them down and converts them into glucose, or simple sugar, because the body primarily uses this form of energy. In diabetics, the body lacks enough insulin to help absorb glucose in the bloodstream, or doesn't respond to insulin at all.

Bed bugs live in warm and dry places, like mattresses, and feed on blood. A person of any age is at risk for getting bed bug bites and the treatment is the same for every age. If your baby gets bitten by bed bugs, you can handle it by controlling the itching and discomfort and eliminating the bed bugs.

Keeping birds as pets may seem like a harmless hobby, but allergies to bird feather dander and bird fecal matter present health risks in the form of allergies. While more people develop allergies to cats and dogs, allergic reaction to birds is commonplace.

Once you give up your daily cigarettes, you significantly reduce your risk of smoking-related diseases such as cancer, heart attack, stroke and emphysema. According to the National Cancer Institute, you’ll reap the benefits of not smoking very soon after you stop.

Propane is a flammable derivative of the oil- or natural gas-refining process. It can be transported in certified tanks of many sizes, a feature that makes it a popular fuel for powering outdoor stoves. Propane stoves are convenient, but can also pose safety risks such as fire and carbon monoxide poisoning.

Marijuana, or "pot," is a mixture of dried, shredded leaves, stems, seeds and flowers of the hemp plant Cannabis sativa, according to Drugs.com. It is usually smoked, but some users cook it into foods. The main active chemical in marijuana is called THC, which is delta-9-tetrahydrocannabinol.

Acid reflux can impact more than just the esophagus -- the tube that brings food from the throat to the stomach. Irritation of the esophagus and a burning sensation in the chest are common with acid reflux, but other organs can also be affected, especially when reflux has been present for a prolonged period of time.

Inflammation of the dental pulp can cause a mild, moderate or severe toothache. This small soft tissue structure found inside a tooth contains blood vessels, nerves and connective tissue and functions to create the tooth’s hard structure during development, according to the American Association of Endodontists.

One percent of the U.S. population reports an allergy to peanuts or tree nuts, including cashews, according to a study published in the 2012 issue of “The Journal of Allergy and Clinical Immunology.” Symptoms of cashew allergy involve the skin, gastrointestinal and respiratory systems.

While fungal infections in the armpit are rare, they can become quite severe given the right conditions.

Yellow stool, also known as pale stool, may be an indicator of a serious medical illness. There are several medical conditions that may cause yellow bowel movements. If bowel movements that are yellowish in color are seen, an examination by a physician may be required to rule out a serious medical issue.