Studies have shown that when properly done on patients with no active decay, there is no damage. Â According to the American Dental Association, damage to teeth after whitening can occur with overuse of at-home whitening systems as these are administered without the supervision of a dental professional. Â Damage could also occur in the enamel if inferior whitening solutions are used. Â Some patients experience sensitivity in their teeth or irritation to the gums for a short time immediately after treatment; however, symptoms usually resolve quickly and no permanent damage occurs.