Good afternoon doctor my baby boy is 1 year 10 month old . From 20 days I m observing his first urin in morning after bed is yellow . only first urin in morning is yellow colour . others not . no yellow in diaper also . I gave a lot water to drink before bed at night . still it continue. And in day time he pass urin in 30 minutes / 20 minutes gap . sometime it's good. sometime urin quantity is less . sometime it's good . please suggest me what to do .