1. Indigestion: 

• Overeating, inadequate enzyme secretion, spicy food, anxiety can cause discomfort and various symptoms. It is called indigestion.
• Improperly digested food or food poisoning also can cause indigestion.
• It leads to loss of appetite, acidity (acid reflux), heart burn, regurgitation, dyspepsia (upper abdominal pain), stomach pain.
• Avoiding eating large meal, lying down after meal, spicy, oily, junk food, smoking, alcohol are the.preventive measures for indigestion. 

2. Constipation: 

• When frequency of defaecation is reduced to less than once per week the condition is called constipation. 
• Difficulty in defaecation may result in abdominal pain distortion, rarely perforation. 
• The causes are, affected colonic mobility due to neurological dysfunction like spinal cord injury, low fibre diet, inadequate fluid intake and inactivity. 
• Roughage, sufficient fluids in diet, exercise can help improve the conditions. 

3. Vomiting: 

• In this condition, the stomach contents are thrown out of the mouth due to reverse peristaltic movements of gastric wall. 
• It is controlled by non-vital vomiting center of medulla. 
• It is typically associated with nauseatic feeling.