Muscle Strains
Many muscles in your abdomen are used simply by going about your daily activities. As a result, pulling or straining these muscles is common and can be highly painful.
Exercising frequently can increase the chances of muscle strains, especially when partaking in sports or exercises that use a lot of abdominal muscles.
Irritable Bowel Syndrome (IBS)
Irritable bowel syndrome (IBS) = disorder that affects the large intestine
Signs and symptoms = cramping, bloating, gas, diarrhea, constipation, and/or nausea
IBS can cause abdominal pain as your large intestine has problems processing certain foods and drinks.
Hernias
Hernias can be caused due to muscle weakness, straining from heavy lifting, or a previous injury. Hernias are when an organ or fatty tissue protrudes through the wall of the muscles which usually keep it contained, typically in the abdomen.
Small hernias are often painless, but large hernias can be excruciatingly painful.
Larger hernias may cause bloating, constipation, acid reflux, swelling, abdominal pain, and/or shortness of breath.
Acid Reflux
Acid Reflux = when stomach acid flows back up into the esophagus (aka food pipe)
Result of acid reflux includes heartburn, upper abdominal pain, cramping, etc.
Kidney Stones
Kidney stones are caused by chemical build up in urine which crystalize to produce stones.
Smaller kidney stones can be passed through the urinary tract. However, larger kidney stones can cause extreme abdominal pain along with vomiting and nausea.