1. Duplex ultrasound, plethysmography, and venography are common non-invasive and invasive tests used to investigate varicose veins. 2. Treatment options include conservative measures, injection sclerotherapy, and surgery. Surgery involves stripping the saphenous vein and removing tributaries and perforators. 3. Newer treatments include endovenous laser ablation which closes the vein using laser without removal and subfascial endoscopic perforator surgery to ligate perforators through a small incision.