Common Causes For Stomach Pain In Children And When To Worry
Updated Apr 17, 2026
11Red flags
Some conditions, like ulcers, rarely strike kids before puberty, while others, like celiac disease (an immune system reaction to a protein in some grains), often cause hard-to-miss symptoms like prolonged diarrhea and weight loss. Dial your doctor if your child has any of the following symptoms:
Under six months old
- fever
- diarrhea (abnormally frequent, watery stools that may contain mucous or blood)
- extreme fussiness
- sunken fontanelle (soft spot)
All ages
- weight loss
- bloody or black stools
- abdominal pain that awakens child at night
- difficulty swallowing
- pain when urinating
- belly pain lasting longer than 24 hours
- vomiting that continues for four to six hours or longer
- vomiting dark green material
- symptoms of dehydration: decreased urination; dry skin, mouth and tongue (look for stickiness under the tongue); no tears; sunken eyes; greyish complexion; extreme drowsiness or lethargy
