Medscape Case Challenge: A 30-year-old woman presents with recurrent abdominal pain and loose stools. Over the past year, her symptoms have gotten worse, and she now feels significant bloating. Do you know the cause?

Worsening Abdominal Pain and Bloating in a 30-Year-Old Woman
A 30-year-old woman presents with recurrent abdominal pain and loose stools. Acute worsening occurs immediately before defecation, with improvement after defecation. What's the diagnosis?
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