Dear doctor,
I am 26 years. My job profile is desk (computer)job. Since 2 years i am suffering ankle pain and knees pain(mild). Since one year i am facing my neck stiffness. And recently 2 months back onwards mild pain comming on my lower spine left side. Here important thing is that all pain are occures only when i wake up in the morning. And there after(usually 15 minutes) it will gone automatcally. Means when i feels relaxed some time after this pain are comming. I was tested low levels of
vitamin-D which is 6.93 mg/dl.only. recently i consulted one more doctor he suggested me that to test HLA-B27 TEST.what is this test?