Used tooth whitening paste for 2 wks (stopped now). front teeth have been sensitive for last few days. could those couple of days cause loss of enamel?

Probably not: The primary ingredient is a stabilized form of Hydrogen Peroxide. There are ingredients used to keep it in a gel form and the less expensive ones can create short term sensitivity. You should consider a desensitizing tooth paste to use in conjunction with bleaching or better yet see your dentist for a safe and effective professional teeth whitening!

Follow with dentist: Teeth whitening removes the stains and debris, leaving the enamel cracks open and exposed. Some of the cracks are quickly re-mineralized by saliva, while others are filled up again with organic debris. See your dentist for evaluation and possible prescription of the Fluoride toothpaste to help with sensitivity.

Probably not: But the whitening agents in the paste may have irritated the teeth. Refrain from using the material until your teeth are no longer sensitive, and then only in moderation. If sensitivity continues consult your dentist.

Toothpaste: Whitening toothpastes are usually a bit more abrasive than other toothpastes. You did the right thing by discontinuing use when your teeth became sensitive as you may be sensitive to one or more of the ingredients. Ask your Dentist to advise you as to best dentifrice for you, and best whitening regimen.