Acidic drinks and foods, such as soda and tomatoes, can weaken tooth enamel and lead to tooth decay. An unfortunate side effect of chemotherapy is nausea and vomiting, which is also very acidic and attacks tooth enamel.

You may find that you want to brush your teeth immediately after vomiting, but this can actually cause more harm than good. Brushing your teeth while your tooth enamel is soft due to vomiting can increase enamel erosion and damage, leading to increased risk of developing cavities. It is advised that you rinse your mouth thoroughly with water after vomiting to help freshen up and clean your teeth but avoid brushing.