Bad breath

Flossing for Bad Breath: Why the Order Matters

Published 2026-10-31 · Educational guide

Quick answer: Clean between your teeth before you brush. Flossing or interdental brushing removes food and plaque from the spaces toothbrushes don’t reach, and brushing afterward lets toothpaste work on more surface.

Why between-teeth cleaning matters

A toothbrush covers the outer, inner, and chewing surfaces of teeth, but leaves the contact areas between teeth. Food trapped there can ferment and add to odor.

The American Dental Association recommends brushing twice a day and flossing daily.

Why the order matters

Flossing first loosens debris from between teeth, so the toothpaste you apply afterward can reach those areas more easily. Many people find this order easier to stick with at night.

How to do it

Use about 18 inches (45 cm) of floss, wrapped around your fingers
Slide it gently between teeth, curving it into a C shape around each tooth
Use a fresh section for each space
Consider interdental brushes if floss is hard to use

Frequently asked questions

Should I floss before or after brushing?

Many dentists suggest before, so the toothpaste can reach cleaned spaces. Either order is better than skipping floss.

Is an interdental brush as good as floss?

For many people, interdental brushes clean the spaces well, especially where gaps are wide. Ask your dentist which tool suits your teeth.

Sources

This article is for education only and doesn’t replace care from a licensed professional. Before buying any product or changing a treatment, consult your dentist or physician.