Recurrent abdominal pain or cramping
Pain related to bowel movements
Change in stool frequency
Change in stool form or appearance
Diarrhea, constipation, or both
Bloating
Excess gas
Feeling of incomplete bowel movement
Mucus in stool
Symptoms lasting at least 3 months
Symptoms starting before age 50 is common
Symptoms triggered by stress or certain foods
No red-flag symptoms such as blood in stool, unexplained weight loss, fever, or nighttime symptoms
A doctor confirms the diagnosis after evaluating symptoms and ruling out other causes