Sclerotherapy is used to treat spider and varicose veins.
According to the Mayo Clinic, during the procedure a doctor injects a solution into the veins that is meant to close them and force the blood to reroute to healthier veins. After a few weeks the spider veins should begin to fade.
The benefits of this procedure, according to the Mayo Clinic, is it can be done in your doctor’s office without anesthesia.
The Mayo Clinic says some side effects that could occur are swelling and itching around the treated area.