Why does a four-month-old baby always eat their hands

Patient's question:

My mom hasn't been able to cook recently and often says she feels dizzy and has a headache. The key is, I don't know what's going on, but I just see that she isn't doing well mentally. Why does a four-month-old baby always eat their hands?

Doctor's answer:

Babies sucking their fingers during infancy is a normal phenomenon, indicating a sign of intellectual development, as well as a marker for the preparation stage of hand-eye coordination and the differentiation stage of finger functions. It also plays an important role in the psychological development of the child. If it persists for a long time, it becomes a bad habit.
We know that attention deficit hyperactivity disorder (ADHD) can cause significant harm to children. If it is not treated in time or if the treatment methods are incorrect, its progression is rapid, and it can bring great harm to the patient. Therefore, it is crucial to seek professional medical treatment promptly at a reputable hospital. This is the key.

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