What strength of Sclerotherapy should be used for my feet and ankle veins and does it matter if it's foam or liquid? (photos)

If someone is well trained in sclerotherapy they shoudl be able to treat these areas with different agents.  I find that foaming and asclera do the best in my hands.  Please see an expert.  Best, Dr. Emer.

Over the years I have changed from using liquid to using almost exclusively foam sclerotherapy unless there is a patient who cannot have foam.  The concentration of the foam depends on the veins being treated with the larger veins requiring a higher concentration.  I usually treat as many veins an feasible in one session.

Both Sotradecol and Polidocanol (Asclera) works very well, however I do refer Polidocanol especially on  areas like ankle or behind a knee, where is skin is thinner and more prone to post injection pigmentation. Smaller veins (