Ankylosing spondylitis is an autoimmune disease primarily affecting the axial joints. The onset is determined by both genetic and environmental factors, leading to the disease. This means that the disease exhibits a significant familial aggregation and genetic predisposition. If the parents have it, the incidence in their children is much higher than in others. However, it is definitely not a genetic disease; it just has familial clustering and genetic tendencies. If symptoms like stiffness in the neck or pain in the lower back intensify when at rest and decrease after activity, it is essential to use CT or MRI scans and test for HLA-B27 to check for damage or narrowing in the sacroiliac joints. Early diagnosis and early treatment are crucial to improve the prognosis of the condition.