Levothyroxine, also called T4 or thyroid hormone, is a commonly used thyroid medication. Brand names for this drug include Synthroid, Levothroid, Levoxyl, Tirosint and Unithroid.

If you experience rib pain when you press the left side of your ribcage or stretch your body, one of a few problems could be the culprit. Inflammation in the rib cartilage, known as costochondritis, is a cause of pain in that area.

Exercise is good for your muscles, inside and out. The digestive system includes multiple organs that connect in a long, winding path from your mouth to your anus, breaking down food and extracting nutrients along the way.

A cholecystectomy is the surgical procedure that involves removal of the gallbladder, and over half a million people a year have this procedure. The gallbladder collects bile, which is a fluid produced by the liver that aids in digestion.

A poor appetite can have a multitude of causes -- from cancer and other chronic illnesses to depression -- but it's often temporary and treatable. If you're recovering from an illness, it's important to ensure proper nutrition so you can get your strength back and put on healthy weight you may have lost.

Hemorrhoids are swollen varicose veins in the anus and/or rectum. They are caused by bearing down during defecation or childbirth, and may also develop from standing for long periods or from constipation. The pressure of bearing down causes the veins to swell, expand and bulge outside the body.

A colonoscopy is a procedure that examines your large intestine and rectum to diagnose several health conditions, including colon cancer and polyps. Despite the outpatient techniques used during a colonoscopy, medication and dietary restrictions begin several days before the examination.

When you experience a bout of gastritis your stomach lining becomes infected and inflamed. The most common cause of the condition is the H. pylori bacteria, the same bug that causes ulcers, according to the University of Maryland Medical Center.

Belching is a normal bodily function that occurs when too much air builds up in your stomach and needs to escape. It's commonly caused by swallowing air as you eat, but it's completely harmless. It can, however, be uncomfortable and annoying, so learning how to reduce how much air you swallow can help.

When food enters your digestive tract, it is converted into an absorbable nutrient. Some parts of popcorn are more easily absorbed than others. Popcorn is considered a whole-grain food source, meaning it contains the entire grain kernel.

If you experience stomach pain and an urge to move your bowels after eating, you're probably wondering what's going on. Many people use the term "stomach pain" not only to describe pain in the stomach, but also in the abdominal area, too. See your doctor if stomach pain and bowel urges concern you.

You might have noticed that after eating fried foods, you tend to have abdominal discomfort. Because fried foods contain high levels of fat, they easily add to the waistline and can cause stomach pains.