Swelling becomes incapacitating, or the skin over your varicose veins becomes flaky, ulcerated, discolored, or prone to bleeding -- you could be developing stasis dermatitis. You may want to have the veins removed to avoid further discomfort and prevent potentially more serious circulatory problems.
You have red, warm, and tender varicose veins. This may be a sign of phlebitis, which is caused by a blood clot in the vein.
You have injured a varicose vein. Control the resulting burst of blood with direct compression and leg elevation. Have your veins evaluated by a vein specialist as this is a serious complication.