Unsuccessful Sclerotherapy. Another Option for Vein Treatment?

Thank you for the question! In addition to sclerotherapy, I offer endovenous laser ablation, Clariven treatment, and microphlebectomy to treat varicose and spider veins. It's not a matter of one treatment being better than the other. Rather, the choice of treatment will depend on a size and location of your veins.  
In recent years, endovenous laser ablation (EVLA) has replaced traditional surgical method of treating varicose veins. This procedure uses laser to heat the veins instead of surgically removing them. The heat produces a steam bubble inside the vein, which destroys the vein walls, causing the affected vein to collapse. The body, in turn, naturally absorbs the dead tissue. 
Microphlebectomy is ideally suited to treat superficial bulging veins that are too large for sclerotherapy.  In the course of this treatment, I will make tiny incisions as small as 1mm to remove an undesirable vein.  He will then insert a small phlebectomy hook to extract the vein through the puncture.  Only a small section of the vein needs to be eliminated because the remaining portion of the vein will clot off and gradually fade from view. 
Clarivein is a minimally-invasive procedure that utilizes a thin infusion catheter clinically proven to deliver faster results and guarantee up to 74% less pain than most other peripheral vascular treatments. 
An in-person exam with a board-certified plastic surgeon would be the best way to assess your needs and obtain expert medical advice. Best of luck! 

A picture would have been very helpful for guidance.The clinical history you provide is not uncommon, especially when veins are treated by non specialists. The reason for 'failure of treatment' or 'recurrence' is that the underlying problem, such as venous insufficiency arising at the saphenofemoral or saphenopopliteal junction or along perforator veins was NOT addressed at the time of treatment. I suggest you see a vein specialist. Read the ebook on the link below.