Enterocolitis is inflammation of the small and large intestine together — enteritis plus colitis in one word. Infectious enterocolitis follows the same faecal–oral culprits as gastroenteritis, producing diarrhoea that may be watery or bloody, with cramps and fever; necrotising enterocolitis is the devastating form striking premature infants, where the bowel wall itself begins to die. Inflammatory bowel disease — Crohn’s and ulcerative colitis — produces chronic enterocolitis of autoimmune origin. Treatment follows the cause: fluids and time for the infectious forms, antibiotics where indicated, and immunosuppression for the autoimmune ones, with nutrition support throughout since the inflamed bowel absorbs poorly. The word’s value is anatomical precision — it says the inflammation spans both intestines, which shapes both diagnosis and the dietary management that follows.