When should I worry about my baby spitting up?

Call your doctor if the spit-up seems forceful (shoots across the room), your baby seems to be in pain, or you notice any blood or greenish color in the spit-up or any increase in frequency or intensity of the spit-up. Also call if her belly looks swollen or distended or feels hard. In addition, let your pediatrician know if you notice that your baby doesn’t seem to be gaining weight or is having fewer wet and dirty diapers, as these may be signs that not enough of what she eats is staying down.