Cervical instability refers to a condition where the cervical spine, which is the upper part of the spine in the neck, becomes unstable. This instability can result from various factors, including injury, degenerative diseases, or congenital conditions. Symptoms may include neck pain, headaches, and difficulty with balance or coordination. Diagnosis typically involves imaging studies like MRI or CT scans to assess the alignment and movement of the cervical vertebrae. Treatment options may include physical therapy, bracing, or, in severe cases, surgical intervention to stabilize the affected area and alleviate symptoms.