some times she said stomack pain ande her right leg pain in below the knee why she said ao?

A. stomach pain might be due to gas there are multiple causes of limb pain during this age because it can be normal due to growth pain. it can also occur due to nutritional deficiency mainly vitamin b12 iron and calcium deficiency. if there is excessive playful activity by the child during the daytime it is but obvious that during the night time there might be limb pain. if the limbs are paining without any activity then yes medical examination and treatment will be required