I recently used a voucher for Zoom teeth whitening bought through livingsocial. The procedure itself burned and was painful..the person doing it stopped a couple of times but assured my that was normal. A day or so later dark spots like blood blisters began to form on my upper gums. They spread until they covered the gums above my top four teeth. The pain is incredible. I went to my family dentist who said that there was really nothing that could be done about the burns..just bear it until it heals. A week later and it is still extremely painful not to mention unsightly. I'm hoping I wasn't permanently disfigured. I contacted livingsocial requesting a refund. My advice to you...go elsewhere.
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