Teeth whitening is a procedure to brighten teeth, by removing stains on the surface of the teeth. Tooth discoloration is generally caused by drinks that leave stains, such as coffee, tea, or wine. In addition, tooth discoloration can occur due to smoking, excessive use of fluoride, consumption of certain drugs such as tetracycline, injury to teeth due to collision, or thinning of tooth enamel due to the aging process. Tooth Bleaching Indications Teeth whitening can be undertaken by anyone who has yellow stains on his teeth, especially patients who have healthy teeth and gum conditions, and no holes. Teeth Whitening Warning Some conditions that cause teeth whitening procedures should not be done, including: Age. Patients under the age of 16 years are not advised to do teeth whitening, because until that age, the nerves of the teeth are still growing. Teeth whitening will make teeth more sensitive. Pregnancy and breastfeeding. Pregnant and nursing mothers should not undergo t