What is the situation when children often sigh?

Patient's question:

Four-year-old child, often sighs, frequent at night, no other symptoms
First follow-up question: Four-year-old child, often short of breath, frequent at night, no other symptoms
Second follow-up question: No abnormal diet

Doctor's answer:

Hello, based on your description of the condition, this situation can basically be ruled out as being caused by cardiovascular issues. It is not ruled out that this could be due to a habitual problem in the child. It is suggested that you appropriately educate your child in this regard. However, avoid overly repetitive reminders to the child. Encourage the child to engage more in outdoor activities. If it is determined that myocardial damage is not an issue, the likelihood of it being caused by psychological factors is high. It is recommended to focus on diverting the child's attention more in daily life and avoid deliberately inquiring about or suppressing the child's potential sighing behavior.