This article provides an in-depth understanding of ulcerative colitis, a chronic inflammatory bowel disease. It discusses the symptoms, causes, and effects of the disease, including its impact on the body and the potential for weight loss. The article also explores the role of the immune system and the enteric nervous system in the progression of the disease. Additionally, it explains the rationale behind the administration of Hartman's solution to maintain fluid balance in patients with ulcerative colitis.