Endovenous ablation therapy is a minimally invasive procedure that uses thermal energy to close varicose veins, improving blood flow and alleviating symptoms such as leg pain, swelling, and fatigue. It works by delivering heat through a catheter inserted into the vein, causing the vein to collapse and seal shut. This outpatient treatment is safe, effective, and requires minimal downtime, making it a popular option for managing superficial venous disease.