Sclerotherapy Needles for Varicose Veins?

We typically use a 32 g 1/2 inch needle for sclerotherapy treatment.  The procedure is very tolerable.  

We use 32G (smaller than 30G) in addition to 30G needles which are half inch but also only penetrate the skin a few millimeters.  They are not flexible.

25G or Guage needles are used to do sclerotherapy in our office and they are tiny - this is the size that all practicing vein specialists use - smaller than needles used by diabetics ! 

I use 31 and 33 g 1/2 inch needles routinely  for sclerotherapy.  The 33 g is slightly more flexible than the 31 g. Occasionally I may use a 30 g 1/2 inch needle for slightly larger veins.

When treating small spider veins on the leg a short half-inch needle is used.  The diameter is 30 gauge, meaning hair thin.  It only penetrates into the spider vein for less than a 1/4 inch.  The solution is then injected and treats an area the size of a quarter.  It should be a relatively painless treatment since the needle is so tiny.  When new solutions such as Asclera(TM) are used there is no stinging of the solution.  This method can be used on any visible vein on the leg.