Tooth whitening can make a smile prettier, but there are some things you need to know about the process.
At-home bleaching kits have some strong solutions (hydrogen peroxide, carbamide peroxide or acids). They can irritate your gums and mouth tissue. They can also irritate your teeth, making them sensitive.
And sometimes the bleaching does not make your teeth whiter.
Do not use a homemade solution, it could cause serious problems.
If you want whiter teeth, talk with your dentist. It can be an expensive process, so you want it to be safe. Also, to keep teeth white avoid tobacco, coffee, and tea.