Rickets, also known as vitamin D deficiency rickets, is caused by a lack of vitamin D, leading to abnormal calcium and phosphorus metabolism in the body. The calcium salts cannot be properly deposited in the growing parts of the skeleton, causing incomplete mineralization of the bone tissue during growth. This results in a chronic systemic nutritional disease closely related to lifestyle, characterized by skeletal abnormalities. The most common is nutritional vitamin D deficiency, which is self-limiting. Typically, sufficient vitamin D supplementation and appropriate sun exposure can cure it. If caused by other severe diseases, vitamin D deficiency will significantly manifest liver and kidney function abnormalities. Additionally, some congenital genetic diseases make treatment more difficult when vitamin D levels are deficient.