Jaundice causes lethargy. The phototherapy treatment that is given to treat jaundice can cause extra grogginess in a baby.
The mother and/or her baby are ill or have health problems.
The baby is not taking in enough milk due to feeding problems or low milk
supply. This can cause a baby to become weak and therefore sleepy.
The baby is in an overstimulated environment.
Separation of the mother and her baby after birth, can cause prolonged crying and fatigue.
Signs that your Baby is Unusually Sleepy
The baby does not wake up often enough for feeds. The baby is also not woken up easily.
The baby falls asleep very soon after latching on.
The baby has low urine output, less bowel movements than expected and is gaining weight very slowly or not at all.
The mother may become engorged due to her baby not removing enough milk from the breasts.
If the baby sleeps with his/her eyes tightly shut, with a tense facial expression and is flushed or pale in the face, it could indicate that baby is overstimulated.
Sleepy Baby Tips
Try to feed your baby in a quiet, dim lit room, that is in a calm environment.
Breastfeed on demand. Feed your baby as often as possible. Stay as close to your baby as possible, consider using a baby sling for breastfeeding and closeness. Babies who are held close to their mothers, breastfeed more often.