[header] How to protect gums during teeth whitening [title] Make an appointment for a dental exam and cleaning. [step] Before you start any whitening treatments, you should see your dentist. They can take x-rays, give you an exam, and treat any dental issues you have. 
You should also get your teeth cleaned, as whitening treatments will be more effective and even on clean teeth. [substeps] For instance, you should get cavities filled before whitening your teeth to prevent compounded problems and pain from the bleach.