Summary Crohn’s disease also known as enteritis or ileitis causes inflammation, swelling and irritation of the digestive tract. The disease affects any part of the digestive tract that is starting from the mouth up to the anus. The ileum is the organ in the body, which is affected by the disease. Cronh’s disease is a condition that is currently affecting people in the UK as well as the United States of America. It was reported that the percentage of women affected with crohn’s disease in the UK is higher than men while in the US both female and male are affected with the same percentage. It was reported that some of the people infected by cronh’s disease were brothers or sisters with similar condition or a related infection like IBS (irritable bowel syndrome). Therefore, it affects people of all ages though the most affected are between the age of 15years and 40years according to the statistics. Introduction Crohn’s disease is a condition that is affecting many people and has therefore raised concern. The disease affects the digestive tract and gastrointestinal tract/gut causing inflammation and irritation on the affected part. When infected with cronh’s disease the swelling causes pain and frequent emptying of the bowels resulting to diarrhoea. When the inflammation becomes chronic, scar tissues may build up in the intestines hence causing a stricture. A stricture makes the food to move slowly to the intestines causing pain as well as cramps. The research was primarily conducted to report the causes of crohn’s disease and the people who can be infected by the disease. The research was also about the causes, symptoms, diagnosis, the complications and the treatment of the disease. Crohn’s disease is at times difficult to diagnose and its symptoms resembles intestinal disorders like colitis, ulcerative and irritable bowel syndrome. (Bosworth, Scherl and Weinstock 5). Literature review. Crohn’s disease affects any part within the digestive tract causing inflammation, which can go deeper into the lining of the part affected and swelling of the affected part causing pain accompanied by irritation. The inflammation that is caused in patients with cronh’s disease has been always linked to the patient’s immune system, patient’s gene and the environment. Research indicates that the causes of crohn’s disease are not clearly defined though the condition occur when there is an abnormal reaction of the immune system by treating useful bacteria to the body, food and other substances necessary in the human body as foreign and unwanted substances (Bosworth, Scherl and Weinstock 1). Research shows that the patients who suffer from crohn’s disease develop problems such as blocking the intestines when they become thick as a result of scars as well as swellings. Research therefore shows that doctors treat patients infected with cronh’s disease by giving medications, through surgery, nutritional supplements or by recommending a combination of the options. (Hanauer, and Sandborn 1). The research conducted that has been proven effective in preventing the cause of crohn’s disease or treating. In order to reduce the worsening of the symptoms it is advisable for the patients to take food