A 35-year-old male presented with severe lower back pain that was aggravated by weight lifting and stair climbing. He had a history of a fall two years prior and was diagnosed with ankylosing spondylitis. On examination, he had tenderness in his lower back, limited range of motion, and positive orthopedic tests. He was treated with electrotherapy modalities like SWD and exercises like stretching and strengthening to reduce pain and improve function. The conclusion was that physiotherapy treatment can help improve mobility for patients with ankylosing spondylitis.