Rickets should be treated with D3, but strictly speaking, what we commonly refer to as vitamin D is D3, just phrased differently. Vitamin D3 helps promote the absorption of calcium by bones, preventing the occurrence of rickets symptoms. The main clinical manifestations of rickets appear in the deformation of bones, such as square skull, pigeon chest, flaring ribs, X-shaped legs, O-shaped legs, and other changes in bone status. The nervous system can show symptoms such as night sweats, nervous excitability, balding at the back of the head, poor sleep quality, and easiness to cry. For rickets, it is necessary to diagnose early, timely supplement with vitamin D to prevent symptoms from worsening, and also to get more sunlight and engage in outdoor activities, which helps the body synthesize vitamin D and absorb calcium.