Is scolisis heritery or caused at birth my brother is diagnosed with it and my son is having simariler symptoms

It can be genetic.: Scoliosis--abnormal curvature of the spine--can be hereditary or it may develop from injury or infection. Obviously your son's pediatrician is the best resource to determine if this presumptive scoliosis is abnormal requiring orthopedic intervention. A pediatric orthopedist is also well qualified to answer your concerns. Call for an appointment soon.