Your stomach might feel hard due to abdominal normal muscle tension, constipation or a medical condition affecting your abdomen.

Irritable bowel syndrome, or IBS, is a painful condition that affects the large intestine and can be especially pronounced among runners. Running places a certain amount of stress on the bowels and in some cases can reveal underlying symptoms caused by IBS.

Irritable bowel syndrome, or IBS, is a chronic disorder that affects the large intestine. Individuals with IBS can suffer from unpredictable pain or discomfort that can often be disabling. Fortunately, IBS is not a life-threatening disease and it can be managed daily by proper care such as healthy food choices.

A perforated bowel is a serious condition, and immediate action such as surgery needs to be taken to prevent infection and death, according to the Merck Manual. Bacteria from the bowel can spill into the abdominal cavity, causing peritonitis, an infection of the abdominal lining.

Jalapenos are enjoyed in Mexican foods for their spicy flavor, but may cause stomach aches if you have certain digestive conditions. Not all stomach aches from eating jalapenos are cause for concern. If you’re sensitive to bloating and gas, you may develop gas pains after eating jalapenos.

Irritable bowel syndrome, or IBS, symptoms often seem worse upon waking, at least to patients affected by the disorder. According to gastroenterologist Chung Owyang, chief of gastroenterology for the University of Michigan Health System, in the 2008 edition of "Harrison's Principles of Internal Medicine,"

What you eat affects every system in your body, with the most obvious being the digestive system. Diets heavy on fat and sugar but low on nutrients can lead to some unpleasant gastrointestinal consequences.

Irritable bowel syndrome, or IBS, is a disorder that affects the digestive system. People with the disorder experience pain, muscle spasms and irregular bowel movements that are related to stress, diet and movement through the digestive tract.

A normally functioning digestive tract is essential for good general health and well-being. If you have problems with a spastic colon, also called irritable bowel syndrome, it's essential to pay attention to your diet.

Impacted bowels is an uncomfortable condition that can result from chronic constipation. Also known as fecal impaction, this condition is the presence of solid masses of dry stool in the rectum. These masses block the rectum and make it difficult to have normal bowel movements.

Irritable bowel syndrome, or IBS, is a health condition affecting up to 20 percent of Americans, according to 2007 information from the National Digestive Diseases Information Clearinghouse. The condition causes symptoms of abdominal pain, cramping, bloating, diarrhea and constipation.

Watery or excessive stool may be a sign of a condition that needs to be diagnosed by a medical doctor. Diarrhea and loose stools may be a symptom of irritable bowel syndrome, a food allergy or food intolerance. There are certain foods you can eat that will help you get more-solid stools.