Children sucking fingers, may be a way of expression of perception of things around, may also be due to psychological overstress or micronutrient deficiencies and other reasons.
1. A way of expression of perceiving things around: common in younger babies, especially 3~4 months after birth, at this age the baby is full of curiosity about things around, and at this time the baby does not have the ability to express itself verbally, it may be through the finger sucking way to perceive things around; this is a normal physiological phenomenon, no need to intervene in a special way.
2. Excessive psychological tension: commonly found in older children, if they suddenly arrive at an unfamiliar environment, or often criticized by their parents, resulting in insecurity, mental tension, fear, may show the phenomenon of finger-sucking, as a means of relieving the inner tension and fear.
3. Micronutrient deficiencies: some children are overly paranoid and picky about food, resulting in inadequate dietary intake of nutrients, which can easily lead to micronutrient deficiencies, which may lead to finger sucking, and may also appear to eat lumps of coal, dirt, mud, and other xenophilic behaviors.
If the phenomenon of frequent finger-sucking occurs in older children and is accompanied by other obvious abnormal behaviors, they should seek medical treatment as soon as possible to clarify the causative factors and then be guided by the doctor for treatment.