Medical Conditions - Knee Cracking Sound

Crepitus is a medical term that describes a joint's popping, clicking, or crackling sound. People usually notice crepitus in their knees, but it can also happen in other joints like the shoulder, elbow, or neck. Crepitus is generally harmless and occurs when air seeps into the soft tissues around the joint. Osteoarthritis, patellofemoral pain syndrome, torn cartilage, and joint replacement. Exercise, diet, weight management, nonsteroidal inflammatory drugs, and physical therapy may help manage symptoms.