The pain that you experiencing in the leg, groin and buttocks may be neuralgia
(compression of nerve roots arising from the back bone). You should get a MRI of the lumbar vertebra and sacrum to confirm the problem and find out the extent of the problem. MRI also will help in deciding whether any intervention is required.
Your high blood pressure
may not be related to your pain. But they are also serious problems which have to taken care of. Longstanding high BP
and cholesterol may affect the heart, kidneys and brain.