3 yr old son complaining of pain from just below sternum through lower abdomen. no obstructions felt. doesn't talk well so can't explain the pain.

Fluids/temp check/MD: If he has a history of constipation, this may be causing the pain in the midline of his abdomen. I would suggest monitoring his temperature, keeping him well hydrated and including fiber in his diet. If the pain persists or worsens, a doctor should see him. A CF sweat test is sometimes ordered to rule our CF a genetic disease, in cases of chronic GI problems.