<s>[INST] My Nephew aged 11 years is feeling severe pain in both legs and not able to move his legs at all, after seeing a orthopedic he was able to move but again after two days felt same excess pain but this time including waist also below waist he was not able to move at all. again saw ortho and and now is able to walk but still he is very weak, so plz suggest what may be cause and to which dept we should consult? [/INST] Hello, A detailed evaluation is required. Neuropathic and vascular causes have to be ruled out. MRI and nerve conduction study have to be done. Consult a neurologist and he will direct you accordingly. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Shinas Hussain, General & Family Physician </s>