The reason for the formation:

1. unbalanced diet. Partial picky eaters, monotonous nutrition, lack of vitamins and trace elements, low nutritional utilization rate.

2. There are too many activities. Excessive activity, excessive physical consumption, unable to make ends meet. Although I ate a lot, I was still hungry. "I didn't gain meat after eating."

3. Too little sleep. Children's lack of sleep will affect their growth and development such as height and weight.

4. Suffering from some chronic diseases. Check anemia and wasting diseases, such as intestinal parasites, gastrointestinal diseases, internal bleeding, etc.

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