Abnormal pee colour may be a sign of a problem. Babies with abnormal pee colours should be seen by their health-care providers.
1) Orange-red pee or dark yellow pee in a newborn
Newborn babies who are not getting enough colostrum or breast milk generally have fewer pees per day. Their pee may be dark yellow instead of light yellow, or it may be orange-red (brick coloured), a colour caused by urate crystals, which develop when the urine is too concentrated. These babies will show other signs of not getting enough milk.
Babies who are dehydrated from vomiting or diarrhea will have dark yellow pee.
2) Red or brown pee
Blood in the pee can cause it to turn red or brown. Possible causes include:
- An abnormal structure of the urinary system
- Inherited (genetic) diseases
- High levels of minerals in the urine
- Kidney disease
- Kidney infection
- Some medications
Urine can be brownish if jaundice is present.
3) Pink pee
Rarely, the bacteria Serratia marcescens can infect breast milk and babies’ gut and urinary systems. These bacteria produce a pink pigment, resulting in pink breast milk and pink pee in babies.