Mucus coming into the mouth after eating is caused by postnasal drip, a sinus condition where mucus drips down the back of your throat because it isn’t able to drain properly out of your nostrils. Postnasal drip after eating can be caused by spices, extreme temperatures in your mouth or a food allergy.

A duodenal ulcer is an open sore found at the beginning of your small intestine, a site referred to as the duodenum.

For most people, grains are fairly easy to digest, as long as they’re cooked. The exceptions are people who are gluten intolerant and those who suffer from Complex Carbohydrate Intolerance, or CCI.

Gastric ulcers, also known as peptic ulcers, are characterized by erosion of the lining of your stomach or esophagus. This produces sores that can cause pain, burning sensations after eating and nausea. About 10 percent of adults in the United States suffer from gastric ulcers, according to Phyllis Balch, author of "

If you feel pain in your anus or lower rectum, you might have a hemorrhoid. These swollen, inflamed veins can be internal, meaning it is located inside the rectum, or external and located under the skin around the anus.

A feeding tube is a long, narrow tube inserted into the stomach indirectly through the nose or mouth, or directly through the abdomen. During feeding, liquid food products pass into the stomach through the feeding tube, ensuring that patients receive adequate dietary nutrition and caloric intake.

Surgeons perform gallbladder removal using a procedure called a cholecystectomy. It is commonly used to treat those experiencing severe pain or other complications resulting from gallstones or inflammation.

Chronic acid reflux is likely to inspire any number of lifestyle changes, and choice of beverages may be one of them. Many “go-to” drinks like coffee and sodas are likely to aggravate heartburn and other symptoms of acid reflux, which in its chronic form is known as gastroesophageal reflux disease, or GERD.

Salsa is intended to be enjoyed, but for some people, eating salsa can begin a chain of unpleasant symptoms.

Digestion is a complex process that requires coordination of physical and chemical factors. As you place food in your mouth and begin to chew, you are mechanically breaking it down and exposing it to digestive enzymes, releasing nutrients that will eventually be absorbed into your bloodstream.

Ulcerative colitis is a condition that affects more than 500,000 Americans, according to the University of Maryland Medical Center. This condition is characterized by chronic inflammation of the lining of the large intestine, and can produce ulcers along the walls of the rectum and large intestine.

Experiencing stomach pain after eating a dairy product one time could be due to eating too much or because the product was spoiled. If you experience pain consistently after eating dairy, however, it is most likely an underlying digestive problem.