Through this an injection of fluid is introduced which sticks the walls of the thread, spider or broken vein together so that blood cannot return. The walls of the thread vein, spider vein or broken vein that have been damaged by the injection are slowly removed by the body's natural defence mechanisms over a period of months. Once the vein has been injected it can take between two weeks to six months for it to completely disappear. On rare occasions it can take up to a year.Microsclerotherapy treatment is suitable for the vast majority of small, clearly visible thread veins, spider veins and broken veins. Several treatment sessions may be required- as in clinic for advise.