Rickets is a global chronic nutritional disease caused by a deficiency of vitamin D, leading to disorders in calcium and phosphorus metabolism and abnormal bone development. The main issue stems from the lack of vitamin D, which causes abnormalities in the body's calcium levels, thus it's important to ensure dietary intake of vitamin D. For early infancy, it is generally recommended to strengthen feeding practices. Infants under six months should be exclusively breastfed until six months of age, followed by timely introduction of complementary foods. Cod liver oil, which is rich in vitamin D, should be routinely supplemented starting from the second week after birth, along with regular monitoring of growth and development. As complementary foods are introduced, try to include vitamin-rich vegetables and appropriately supplement with calcium-rich foods, such as certain seafood, while being mindful of potential allergies in children. Additionally, it is beneficial to include some high-protein, nutritious foods. Most importantly, children should persist in outdoor activities to get ample sunlight and continue supplementing with cod liver oil.