If the four-year-old child calcium supplement, it is recommended that drugs and food together to supplement, so as to be more conducive to calcium supplementation, the choice of drugs can choose calcium carbonate granules, calcium carbonate chewable tablets, milk calcium, or you can choose Longmu Strong Bone Granules, provided that the child’s night sweating is more obvious. It is recommended to supplement calcium and vitamin D together, which is conducive to the absorption of calcium, and at the same time, in daily life, we should take the child to outdoor activities, more sunshine, which is conducive to the skin synthesis of vitamin D, more conducive to the absorption of calcium. Dietary advice more oral calcium-containing foods, such as milk, dairy products, soy products, lean meat, bone broth, shrimp, etc., are conducive to calcium absorption. Food and medicine should be supplemented together, which is more favorable to the child’s calcium intake.