Children’s legs are not straight mostly related to calcium deficiency, improper sitting posture, leg deformity and other reasons, and the treatment is different for different reasons. It is recommended to go to the regular hospital for examination and correction according to the doctor’s guidance. 1. Calcium deficiency: lack of calcium will lead to slow bone development, resulting in deformation of the legs not straight, in daily life should pay attention to calcium supplement, take cod liver oil and other to promote the absorption of calcium, you can also appropriate outdoor exercise. The symptoms may recover after calcium supplementation. 2. Improper sitting posture: Long-term poor sitting posture will affect the development of bones and legs, resulting in children’s legs not straight. This situation can be treated by wearing braces, along with massage and acupressure. 3. Leg deformity: it may be congenital developmental deformities or skeletal diseases that lead to leg deformities, resulting in leg not straight, this situation should be promptly examined in the hospital to find out the specific causes of leg deformity, symptomatic treatment. Children’s legs not straight may affect their later life, so if the symptoms persist until about one year old, they should be corrected in time, such as letting the child do exercises, calcium supplements, wearing orthotics, etc. If it is caused by a disease, they should go to the hospital in time for treatment.