(HealthDay News) -- You know that tobacco is bad for your health, and your mouth is no exception.

The American Dental Association says smoking or chewing tobacco can cause or contribute to:

• Cancers of the mouth.
• Gum (periodontal) disease, which can lead to lost or sensitive teeth.
• Bad breath, stained teeth, and even a stained tongue.
• Reduced ability to taste and smell.
• Slower healing after oral surgery.