How to deal with a baby crying at night

Patient's question:

Over a month
Detailed medical condition and purpose of consultation:
1. The child always cries for a while before falling asleep at night; this situation is not as severe during the day.
2. Over the past two days, the child has been coughing frequently at night and in the middle of the night, with very intense coughing that sounds like it's accompanied by a bit of dry heaving.
Please ask the doctor, what could be the cause of this, and what should we do?
First follow-up question: My child also doesn't sleep much during the day, and wakes up after sleeping for no more than ten minutes each time. Every evening...

Doctor's answer:

Crying comes in two types: one is physiological crying. This is an instinctive response and a way for babies to express their emotions and needs, possibly due to hunger, temperature changes, being startled, or having nightmares. In this case, parents only need to calmly soothe the baby to help it calm down.
The other type is pathological crying, which should be taken seriously. Any illness that causes pain, itching, or discomfort to the baby can lead to restlessness and crying, such as fever, eczema, rickets, oral herpes, pinworm infection, or intussusception. If a baby cries at night without a clear reason, parents should first consider physiological causes and then explore pathological factors. If necessary, it is important to seek medical attention promptly.