This chapter provides detail description of abdomen. Chapter has 2 well illustrated diagrams and pictures. Causes and effects of symptoms of GI disorders, anorexia, dyspepsia, gingival hyperplasia, chronic diarrhoea, malabsorption syndrome, Celiac disease, black tongue, macroglossia, hepatomegaly, hepatic coma, lock jaw, amoebic dysentery are given in detail. 11 tables are included to highlight difference between vomiting and regurgitation, difference between visceral pain and peritoneal pain, difference between splenomegaly and renal swelling, difference between aneurysm and mass adjoining blood vessel, difference between ascites and ovarian cysts.