Rickets is primarily a nutritional disease caused by insufficient levels of vitamin D leading to disturbances in calcium and phosphate metabolism, resulting in abnormal bone development. The most common type is nutritional vitamin D-deficiency rickets. This type of disease is self-limiting and thus relatively easy to treat. It requires early detection and proactive intervention. Early measures include encouraging children to engage in outdoor activities and supplementing with appropriate doses of vitamin D, which can effectively treat rickets. However, there are also special causes of vitamin D deficiency such as significant anomalies in liver or kidney function and certain genetic diseases that severely impair vitamin D absorption. When vitamin D treatment is ineffective, it may be due to other special causes. Treatment of rickets under these circumstances can be more challenging, and genetic diseases may respond poorly to treatment.