I read your post and I have never seen that happen and have never seen it presented as a side effect or complication following sclerotherapy ! A literature search on PubMed (on January 22, 2015), which is a database of 23 MILLION scientific publications, shows '0 results' when a search was...
No matter what sclerosant is used (hypertonic saline, sodium tetradecyl sulfate, polidocenol, or sodium morrhuate are the most common ones), it needs to get inside the spider vein to do its work! The smaller the spider vein, the harder it is to hit properly. Sclerotherapy, as you have found out,...
It is wise that you question the doctor performing your vein treatments, as all vein doctors are not created equal. The complexity of the condition helps determine how highly trained the specialist should be. The only doctors which receive board-certification in vascular & vein...