Mouthwashes that claim to prevent cavities, discomfort, and bad breath may help if you brush your teeth and floss regularly. Our dentist will be able to suggest the best one for you. For some people, such as people with gum health issues or those with dry mouth, a toothpaste without alcohol is recommended. Younger children under the age of 6 shouldn't use mouthwash because there is a chance they might swallow it.