Rickets, also known as vitamin D deficiency rickets, occurs because children do not supplement vitamin D in a timely manner after birth, leading to a deficiency of vitamin D in the body and resulting in a nutritional metabolic disease primarily involving skeletal changes. In the early stages, children mainly show symptoms related to mental and emotional state, such as irritability, crying, excessive sweating, shaking their heads back and forth, and rubbing their heads. Subsequently, symptoms like bald patches on the back of the head and softening of the skull bones may appear. As children grow, they may develop conditions such as a square-shaped skull, beaded ribs, pigeon chest, funnel chest, and bracelet-like deformities around the wrists and ankles. In severe cases, children may later develop X-shaped legs and O-shaped legs. If rickets is suspected, it is crucial to promptly conduct a blood test to measure the vitamin D level. If the level is below normal, it is essential to actively treat the diagnosed rickets.