Sclerotherapy is a process that takes patience, as they often come back red and may even look worse for a little while unfortunately. However, they do eventually fade over time making it all well worth it! We typically coach our patients to expect 4-6 weeks for the sclerotherapy to work completely. That being said, spider veins are pesky! Chances are, if you have had them before, they may be hereditary meaning there is a good chance they may form in new places after 2-3 years. It's relatively a small cost to keep them cosmetically maintained for that amount of time. Reach out to your provider with any additional concerns you may have. Take care!