This non-operative method uses micro-injection technology, through very small needles, introducing a small amount of mildly irritating detergent solution into the affected varicose vein or spider telangectasia. This causes the abnormal veins to shrink and be absorbed by the body over one to six months, depending upon the severity and extent of the particular veins. The Vein Clinic dilutes solutions of sodium tetradecyl sulfate, an agent that has been used safely for over 50 years and is FDA-approved.