① The baby has not learned to suck because of premature babies and other reasons.
②The mother’s nipples are too large or too small or even flat and inverted, and the child cannot suck smoothly
③The baby is told by the doctor to separate the mother and the baby for other reasons
④Mother cannot breastfeed during the medication
⑤ Babies who do not eat nipples during the anti-milk period need to remove the milk to avoid the mother's milk stasis