First, the diagnosis should be, ankylosing spondylitis, the hip problem is only a manifestation of the peripheral joints of ankylosing spondylitis, not femoral head necrosis. Secondly, your current treatment should start from two aspects. 1, ankylosing spondylitis has the characteristic of staying in any one period and the course of the disease may last for years or decades, once the diagnosis is made, systematic treatment should be given, irregular and non-systematic treatment are not conducive to the improvement and recovery of the disease, so treatment should be given to ankylosing spondylitis. 2, the hip joint joint gap in, if seriously affect your function, or continued pain seriously affect the quality of life, I recommend joint replacement. In our department, there are quite a few cases of your disease and your age, and the results are very good after joint replacement.