Sclerotherapy is quite safe. The potential complications are not common and occur only at the site of the injection. They include severe bruising, skin discoloration, and rarely development of skin breakdown.
Endovenous vein ablation is also very safe. Bruising frequently occurs and normally lasts for 7-14 days. About one week after the procedure, the treated vein may develop a feeling of tightness similar to that after a strained muscle. This temporary discomfort, likely related to inflammation in the treated vein segment, is self-limited and may be treated with Advil, walking, stretching, and graduated compression stockings. Inflammation of the surrounding veins (superficial phlebitis) occurs in about 5% of cases and it is managed with Advil, compression, and ambulation. Significant complications following laser ablation are very rare and include numbness or tingling, discoloration, skin burns, and blood clots.