Rickets is a chronic nutritional disease caused by a deficiency in vitamin D, which leads to a disruption in calcium and phosphorus metabolism, resulting in abnormal bone development. Typically, the initial symptoms of rickets are most commonly seen 2-3 months after birth. At this stage, affected children often show neurological symptoms such as excessive sweating unrelated to the season, irritability, particularly in infants under three months old who can become easily agitated, and exhibit straining as if constipated, but these are not specific symptoms of rickets. Early diagnosis generally requires specific tests such as blood biochemistry to check the levels of 125 dihydroxy vitamin D3, as well as calcium and phosphorus levels in the blood, and to see if there is any change in serum alkaline phosphatase. The active phase is mainly characterized by skeletal changes, such as early signs of enlarged fontanelles or delayed closure, late teething, and sometimes a softening of the skull resembling a ping-pong ball, gradually leading to a square skull. Subsequently, changes like pigeon chest or noticeable deformities in the lower limbs such as X-shaped legs, O-shaped legs, or K-shaped legs may appear. Sometimes, there may also be curvature of the spine, with occasional scoliosis. These obvious skeletal changes make the condition more recognizable, though the initial presentations are not very typical, necessitating related biochemical blood tests.