Spider vein treatment
Questions in this group, one step at a time
For readers in Ann Arbor, Michigan holding vein paperwork, find the named method before you read anything about price, sessions or results.
The two methods the sources name
www.harvardhealth.org says: "The two most common cosmetic treatments for spider veins are laser treatment and sclerotherapy: Laser treatment directs pulses from a laser light to the spider veins, causing tiny blood clots to form." my.clevelandclinic.org adds: "Sclerotherapy is a minimally invasive treatment for varicose veins and spider veins."

If an agreement names a method that appears in neither sentence, ask what it is and which clause describes it. Spider Veins on Harvard Health gives the fuller entry for the first quote.
The question, and the clause it turns on
This question turns on the results clause, because a promised result only means something next to what the veins may do untreated.
Other references worth reading beside an agreement
For a dermatology view, read why leg veins appear and how dermatologists treat them. ASPS on what to look for in a med spa is a neutral place to start when judging the setting. If the agreement names sclerotherapy, read Cleveland Clinic's treatment page on sclerotherapy and ask which clause matches what it describes.
The claim most worth rechecking
Recheck any sentence that promises a vein will not come back. The sources above describe methods and give no such guarantee, so ask which clause in the agreement backs it.