my son is 4 moths and 10 days old baby. I use diaper only at night and remove it early morning..sometimes I observe minute pink spot on diaper which faints or goes off after rubbing with hand. rest of d day I use cotton nappies and no such stain is observed. rarely 1 or 2 times very light spot appeared on cotton nappy. when he s made to urinate on floor..no colouration is observed. normal urine color is dere..he has no fever..no pain.feeding properly...active throughout day..kindly suggest accordingly..thanks.