### Human:\nat the age of 40 is it common to "fall apart"? . the chief medical officer in the army told me i had been born with a condition in which my sarcral joint was made of cartlage instead of bone. i herniated l3/l4. for months i have had knee pain and dismissed it as possible arthritis however recently i started having neck pain that radiates down over the left shoulder preventing me from full neck motion. after about a week the pain subsided and now i'm having knee pain again on the interior side of the right leg.\n\n### Assistant: we recommend you to visit orthopedic for thorough check up of your spine. better to have specialist opinion for your condition.