Chiropractors diagnose and treat patients whose health problems are associated with the body's muscular, skeletal, and nervous systems, with a focus on the spine. They believe that interference in these systems can impair functions and lower disease resistance, and that spinal imbalance can cause pain. Chiropractic care involves examining the spine and pelvis to evaluate structure and function, identifying areas of malfunction, and performing spinal manipulations or adjustments to restore normal movement and relieve issues like back pain. The goal is to help the body function optimally and heal itself through a natural approach.