The nail is derived from the skin. Like the skin, the nail is formed by the gradual differentiation of the embryonic ectoderm and lateral plate wall layer and the mesenchyme of its somatic nodules after 9 weeks of embryonic life. It is the product of epidermal keratinization of the finger (toe) end and protects the finger (toe) end. The nail bed and nail root are rich in blood vessels, which provide rich nutrition for nail regeneration. Chinese medicine believes that the nails are the external glory of the internal organs and blood, and have a direct connection with the internal organs and meridians of the human body, and can fully reflect the physiological and pathological changes in the human body. By observing the shape, size and color of the nails can reflect the basic condition of a person’s health; and by the changes in the luster, lines, spots, etc. of the nails, it can be inferred that the body is quietly occurring lesions. If the intake of vitamins, calcium and other nutrients is insufficient, the nail surface will not be smooth, bumpy and lusterless. If your nails are uneven and grooved, then it may be time to pay attention to your liver function. In addition, iron deficiency anemia, Raynaud’s disease that causes ischemia of the extremities, fungal infectious skin disease, and plateau disease can all cause uneven nails. Since there are many reasons for uneven nails, children with this condition should be examined at a specialist hospital to determine the cause and treat the problem.