Give child plenty of oral liquids ,atleast child should pass urine 5 times in a day
About potty, if he is constipated increase liquids and introduce child complementary feeding with fibre diet and fruits ripe banana , ripe papaya, soaked prunes etc helps
If child is still not passing stools consult your pediatrician about laxatives.
Next Steps
Diet high in fibre,vegetables or fruits and liquids relieve constipation