Sclerotherapy was developed in the 1920s for the treatment of spider veins. Spider veins are not to be confused with varicose veins, though the terms are often (and incorrectly) used interchangeably. Spider veins are clusters of veins that are sometimes bright blue and grouped at the surface of the skin – they sometimes look like little spider webs, hence the name. Varicose veins are veins that are deeper and incredibly swollen; they bulge out of the skin and make a distinct rippling cord under the skin.
Sclerotherapy is used to treat spider veins. The solution is injected using a micro-needle which causes the spider veins to dissolve and be reabsorbed by the body. It is actually quite fascinating to watch the veins instantly vanish – it gives you a sneak-peek at what your skin will look like once the veins are fully absorbed!