Anxiety is a normal reaction to stress, but if persistent or overwhelming, it may be an anxiety disorder. Common symptoms include excessive worry, restlessness, and physical conditions like shortness of breath or a racing heartbeat. If anxiety interferes with daily functioning or causes feelings of helplessness, seek a professional. Without treatment, anxiety can increase in severity over time and lead to depression or other illness. Early intervention with therapy, medication, and lifestyle changes like relaxation techniques can significantly improve quality of life and prevent long-term effects.