Some factors increase the risk of developing periodontal disease:

• Tobacco smoking or chewing
• Systemic diseases such as diabetes
• Some types of medication such as steroids, some types of anti-epilepsy drugs, cancer therapy drugs, some calcium channel blockers and oral contraceptives
• Bridges that no longer fit properly
• Crooked teeth
• Fillings that have become defective
• Pregnancy or use of oral contraceptives

Several warning signs that can signal a problem:

• Gums that bleed easily
• Red, swollen, tender gums
• Gums that have pulled away from the teeth
• Persistent bad breath or bad taste
• Permanent teeth that are loose or separating
• Any change in the way your teeth fit together when you bite
• Any change in the fit of partial dentures