Sclerotherapy with laser treatment involves using targeted laser energy to treat varicose and spider veins. During the procedure, a laser device is directed at the problematic veins through the skin. The laser emits light energy that heats and damages the vein walls, causing them to collapse and seal shut. This process reduces the appearance of the veins as they are gradually absorbed by the body. The treatment is non-invasive, usually requires minimal downtime, and is often performed in an outpatient setting.