1. Loss of appetite: picky eaters, anorexia, refusing to eat, generally eating less, children are not hungry and do not take the initiative to eat;
2. Eat something strange at random. For example: biting nails, clothes, eating toys, hard objects, eating hair, scraps of paper, raw rice, wall ash, mud, sand, etc.
3. Slow growth and development, 3-6 cm lower in height and 2-3 kg lighter in weight than the same age group;
4. Low immunity, frequent colds and fever, repeated respiratory infections such as tonsillitis, bronchitis, pneumonia, hyperhidrosis, night sweats, etc.
5. White spots appear on nails, and finger barbs appear on map tongue (irregular red and white patterns on tongue surface);
6. hyperactivity, slow reaction, inattention and poor learning ability;
7. Vision problems: decreased vision can easily lead to night vision difficulties, myopia, hyperopia and astigmatism.
8. Skin damage: when trauma occurs, the wound is not easy to heal; Susceptible to dermatitis and intractable eczema;
9. Recurrent oral ulcer. However, the child's stomach is tender and can't stand stimulation. You can go to the hospital to check whether there is zinc deficiency. If you have it, you can buy some third-generation biological zinc, which will not stimulate your child's stomach. Pay attention to eating habits in daily life and eat more foods with high zinc content, such as oysters, squid, carrots, lean meat, walnuts, laver, sesame, Chinese cabbage, bean products and so on.