Leg pain in little girls may be related to factors such as daily exertion, growing pains and pathology. 1. Daily exertion leg pain: the little girl’s activity is caused by too much, and there is damage to the leg muscles. Adequate exercise should be done to avoid exertion. 2. Growing pains: because of the rapid growth and development of the little girl’s muscles, tendons and bones development is not coordinated. 3. Pathological leg pain: such as femoral head dysplasia or hip joint dislocation and other factors, resulting in poor joint alignment, leading to leg pain in little girls. There are many possible reasons for the long duration and aggravation of leg pain in little girls, so it is necessary to go to the hospital as soon as possible for examination, to clarify the causes, and to carry out targeted treatment, so as to prevent the emergence of more serious consequences and delays in the condition.