Night waking and crying in infants may be caused by various factors, including incomplete development of the nervous system, not yet established sleep-wake habits, and diseases such as rickets. Treatment methods include adjusting day and night sleep habits, as well as treating the underlying diseases.

Lip twitching after a nap may be related to hypomagnesemia, and infants should be provided with magnesium-rich foods early.

A baby easily waking up during naptime may be due to cold and indigestion caused by diet and weather conditions.

A child may wake up from a nap in just 2 to 3 minutes due to calcium deficiency or indigestion, leading to night terrors.

A 3.5-year-old baby still wakes up at night after the fever from hand, foot, and mouth disease subsides, which may be related to viral invasion.