How to properly handle a child's night crying?

Patient's question:

My son cries at night

Doctor's answer:

Physiological crying
A child's diaper being wet or too tight, hunger, thirst, unsuitable indoor temperature, or overly thick bedding can all make the child feel uncomfortable and cause them to cry. In this case, parents need only promptly eliminate the negative stimuli, and the child will soon fall asleep quietly. Additionally, some children cry incessantly every time it's time to sleep at night. If parents can patiently soothe them to sleep, the child will quickly fall into a peaceful slumber.