The main symptom is persistent non-bloody watery diarrhea, which may be profuse. People may also experience abdominal pain, fecal incontinence, and unintentional weight loss.<unk>  is the diagnosis in around 10% of cases investigated for chronic non-bloody diarrhea. Associated conditions A higher incidence of autoimmune diseases, for example arthritis, Sjögren's syndrome, thyroid disorders, and celiac disease, has been reported in people with<unk> . Associations with various drugs have been found, especially proton pump inhibitors, H2 blockers, selective serotonin reuptake inhibitors (SSRIs), and non-steroidal anti-inflammatory drugs (NSAIDs). Bile acid diarrhea is found in 41% of patients with collagenous<unk>  and 29% with lymphocytic<unk> . Additionally, cigarette smoking has been identified as a significant risk factor of<unk> .
Microscopic colitis
Bile acid malabsorption
Collagenous colitis
Coeliac disease
Lymphocytic colitis
Crohn's disease
Cytomegalovirus colitis
Lactose intolerance