BMD testing is done for osteoporosis. It is usually done at lower end of radius and ulna( forearm) , lumber spine and hip joint. Osteoporosis is a painless condition. Patients usually presents with fractures or asymptomatic or height loss. So u need to consult a physician 1st for this severe pain or if possible consult a Rheumatologist ( specialist in nontraumatic pain in joints , muscle and bone) for detailed evaluation of its etiology.
Next Steps
Consult a physician or Rheumatologist