My son has a ankle pain regularly since he is 3 years old as i am his father i also have same pain in my childhood.it is a genetically ?

Too broad : Ankle pain is too broad a symptom to be able to categorize into a genetic or even familial condition. If lower limb deformities were inherited, for example flat feet or tibial torsion, then there could be a familial link to the pain. See your pediatrician for guidance.

Possible: They may be a predisposition to develop this symptom or a biomechanical cause that may be inherited. It may also be a coincidence. Consult with doctor.