Lump 3 Years After Sclerotherapy Treatment

It depends alot on what was injected. if something unusual was injected it could be some sort of foreign body reaction. more than likely its just a dermatofibroma or it could be unrelated and warrant a biopsy. an ultrasound might be beneficial in workup.

If this were a clot, your lesion  would be getting  smaller, not larger. There is a remote possibility that the trauma from a needle stick could have triggered a benign lesion called a dermatofibroma, which is really nothing more than a glorified scar. However, I have never seen this happen and it is not mentioned as a side effect of sclerotherapy in the textbooks.  Thus it is very likely that the lump coincidentally formed in an area you had sclerotherapy. While most... more

It is highly unusual for a lummp created after sclerotherapy to enlarge over time. Maybe there is a coincidence and the lump has nothing to do with the sclerotherapy.  You definitely should see a dermatologist and ask for evaluation and a possible biopsy of the enlarging growth.