According to Anne Frye, author of "Holistic Midwifery", there are a wide variety of causes of pain or pressure in the chest during pregnancy. Changes in the body, and an increasing size of a growing baby create symptoms of pain and pressure in the chest.

Internet addiction, while not yet listed in the Diagnostic and Statistical Manual of Mental Disorders, has been formally recognized as a disorder by the American Psychological Association.

If you have epilepsy, you may find that you experience a higher frequency of seizures after eating certain foods, as some food can trigger epileptic episodes, according to the Epilepsy Society. Avoiding these foods and eating regular, balanced meals can help reduce your risk of seizures and improve your overall health.

Methamphetamine, or crystal meth, is a dangerous and addictive drug that stimulates your central nervous system to induce a high, euphoric feeling. You can take the white crystal meth powder by snorting, dissolving and drinking, or by injecting it.

Drug testing has become a way of life in our culture. It is now required with many job applications and for participation in school athletic programs. Testing for marijuana most often consists of a urine test, according to the Centers for Disease Control and Prevention.

Menthol is a natural compound found in plants such as mint, peppermint and spearmint. It is added to cigarettes to enhance flavor and for its cooling and soothing effects. A 2013 report from the U.S.

Alcohol abuse and dependence have devastating effects on the psychology and health of alcoholics. Of the health consequences of long-term alcohol abuse, liver damage and cardiovascular issues have received considerable attention.

Coumadin -- also known by its generic name warfarin -- is a blood-thinning medication. Your physician may prescribe Coumadin if you are at risk for or have experienced a heart attack, stroke or blood clots.

High-fiber foods can help lower cholesterol, improve digestive health and control your blood sugar levels. Harvard University recommends aiming for 25 to 35 grams of total fiber per day, along with plenty of water to help fiber function in your system.

Nicotine is a naturally occurring alkaloid found in tobacco plants. Nicotine has a physiologic effect because it binds to receptors on the neuromuscular system.

Your brain accounts for only 2 percent of your body weight, but uses almost 25 percent of your glucose energy supply. It also requires about 15 percent of your blood supply and a host of vitamins to keep it functioning optimally.

A common bagel topping, smoked salmon is made by cutting the fish into strips, curing it in a brine and smoking it for flavor. Although it has nutritional benefits and drawbacks, smoked salmon can be part of a healthy meal if you consume it in moderation.