All treatments have possible side effects and risks.
The risks of Micro sclerotherapy include:
- Temporary superficial blebs or wheals (similar to hives),
- Skin pigmentation,
- Fine red blood vessels and, very rarely, wound infection,
- Poor healing,
- Allergic reactions,
- Thrombosis or scarring which may or may not prove permanent.
There is the risk that, even after a successful treatment, veins can re-appear and require further treatment.