Hi welcome to the health care magic Your pain is very high degree, hence here spinal causes or nerve compression seems most likely.... Spinal joints inflammation, disc degeneration , Spondylosis etc like causes needs to rule out.. If needed for that MRI done for detect exact cause According to cause specific treatment given If needed nerve decompression surgery, steroid injection for inflammation relief, TENS etc are the various modes of treatment If during examination vascular causes suspected than colour doppler done for that If no specific cause present than vitamin D deficiency and musculoskeletal pain might be the possibility Take care Consult orthopedic surgeon for examination and further work up accordingly Hope your concern solved