Is it normal for a 3-month-old baby to sleep after vaccination?

Sleepiness is normal in infants aged 3 months after vaccination.

After vaccination, the infant's body produces an immune response, an energy-consuming process that can lead to fatigue and lethargy. Antigens in the vaccine stimulate the immune system to work, and the infant's body needs to concentrate on this stimulation, which may indicate a greater need for sleep than usual. The infant itself has a large sleep demand. Sleepiness after vaccination may only be a manifestation of the original sleep demand, but parents may pay more attention to their sleep situation and feel that sleepiness is particularly obvious. Sleepiness is short-lived and usually recovers within 12 days. During this period, parents should closely observe other symptoms of the infant, such as temperature, mental state, eating, etc. If the infant has no other abnormal symptoms other than sleepiness

, parents should take the infant to a doctor for detailed examination and evaluation. In short, if the infant is sleepy after vaccination at 3 months old, parents should not panic, closely observe and take good care of it. If there are any doubts or concerns, consult a professional doctor in time.