All foods and beverages contain certain proteins that are specific to that food or beverage. If your body cannot digest -- or experiences an allergic reaction after you ingest -- certain proteins, you will develop digestive symptoms.

Potassium is an essential dietary mineral, but getting too much of it can have negative repercussions. Constipation is not a common side effect of consuming too much potassium specifically; instead, a combination of dietary factors often contribute to gastrointestinal problems.

Runners might expect to feel soreness in their legs or abdominal muscles after a run. However, some runners might experience chest pain while running, which isn't a typical effect of going on a run.

If you develop constant diarrhea after eating, you may be suffering from a few different conditions. If the constant diarrhea developed suddenly, you could have viral gastroenteritis or food poisoning. If you notice diarrhea after eating certain foods, you may have an allergy to certain proteins found in various foods.

Serum glucose, or sugar in your blood, is the mainstay of energy for your brain and body. Your body relies on the sugar your blood provides to function properly. If your blood glucose levels fall below a level that prevents your body from operating efficiently, it's called hypoglycemia, or low blood sugar.

The knee is made up of bone, cartilage, ligaments, muscles, tendons and joints. If any one of these structures are damaged or diseased, you can experience knee pain, difficulties walking and limited mobility. Arthritis, which affects about 9 million Americans, can wear away tissues in the knee, causing swelling.

Hip pain is a common complaint during pregnancy, and most women experience some degree of hip and back pain during the later stages of pregnancy. According to the American Pregnancy Association, the best sleeping position during pregnancy is known as "SOS", or "sleep on side."

As people age, the lenses of their eyes lose flexibility. This condition is called presbyopia, and it makes close-up objects appear blurry.

Anal fissures are tears in the lining of the anus, the opening through which stools pass from your body. They can also leave tags hanging from the anal opening. Anal fissures are fairly common and usually produce symptoms such as burning, pain and bleeding, particularly during or after a bowel movement.

Side effects experienced by one patient may bypass another. Alprazolam, the generic name for Xanax, treats anxiety disorders. Gabapentin, often prescribed under the brand name Neurontin, combats epileptic conditions.

Glandular fever, more commonly known as mononucleosis, is an infectious disease that is transmitted through saliva. This has given it the street name of the “kissing disease.” MayoClinic.

A hiatal hernia occurs when a section of the stomach moves above the diaphragm into the chest cavity through the hiatus. The hiatus is the small opening in the diaphragm where the esophagus travels to the stomach. The diaphragm is the layer of muscle separating the chest and abdominal cavities.