A neck injury refers to damage to the structures in the neck, including muscles, ligaments, discs, and vertebrae. Common causes include accidents, falls, sports injuries, and repetitive strain. Symptoms may range from pain and stiffness to headaches and limited mobility. Treatment for neck injuries often involves rest, physical therapy, and pain management. In more severe cases, medical interventions such as surgery may be necessary. It's important to seek medical attention if symptoms persist or worsen, as untreated neck injuries can lead to long-term complications.