What is the reason for the child's back discomfort?

Patient's question:

Basic Information: Male, 4 years old
Disease/Symptoms: Back discomfort
Medical Description: My son is 4 years old and has been complaining of back discomfort recently. I don't know what the cause is?

Doctor's answer:

The condition of your child is considered to be a manifestation of kidney or heart problems, or it may be due to fatigue, such as playing mobile phones and computers. Please see a doctor, and if necessary, have an echocardiogram, urological ultrasound, and a series of rheumatic disease examinations. Avoid your child playing computer games, using mobile phones, etc. It may be caused by improper posture during sleep, leading to an imbalance in the left and right muscle tissues of the neck or back, such as using soft pillows that are not suitable for sleeping on, or sleeping on the left or right side, for example. If necessary, you can go to the hospital for an examination.