Digestive issues refer to a wide range of problems that affect the gastrointestinal (GI) tract, including the stomach, intestines, liver, gallbladder, and pancreas. These issues can disrupt the normal process of digestion, absorption of nutrients, and elimination of waste, leading to symptoms such as abdominal pain, bloating, gas, diarrhea, constipation, indigestion, heartburn, and nausea.