Hi,
Thank you for your query,
The common cause of pink urine is presence of blood in urine or drugs.
If your child urine examination is normal and there are no red blood cells in urine microscopy nothing to worry.
If you find again the pink color urine you collect the urine in a sterile container and show to your doctor next time so that he will evaluate further.
Hope i have answered your query.

Hi,
Thanks for opting healthcaremagic.com to post your query and giving us this opportunity to answer your question.
Well, first of all I would like to know,
1) Whether your son passed blood in urine or was it just a pinkish stain on the diaper? Infants (specially newborns) sometimes pass urate crystals in their urine, which imparts a pinkish colour to the urine and leaves a similar coloured stain on the diaper. So, you have to be sure, if its frank blood, blackish coloured clotted blood or is it pink coloured secretions.
2) My second question is what was the urine report when you got it checked? Was it normal or was something wrong in the report?
3) Does he have any problem while passing such urine? Does it pain, is he irritable or cranky while passing urine, fever, how is the flow of the urine?

Well, it can be anything from very sinister like frank blood in stools or it can be just a normal variant if its urate crystals in the urine. So, you must get your child evaluated in detail, preferably by a pediatric nephrologist specially if he has any of the symptoms i mentioned in my 3rd point.

Hope I have been successful in clearing all your doubts and have helped you make a decision. I will be available in case of further doubts. Take care and stay healthy.