Laser venous lake treatment is considered to be very safe, but it is important to choose a provider who is medically trained and experienced with the treatment.
No scarring or other complications were reported in clinical study Bekhor, Philip (11 Sep 2006). “Long-pulsed Nd:YAG laser treatment of venous lakes: report of a series of 34 cases”. Dermatologic Surgery. 32 (9): 1151–4. doi:10.1111/j.1524-4725.2006.32253.x. PMID 16970696