What causes pain when the upper teeth bite down on the lower teeth?

Upper teeth hurting when biting down on lower teeth may be caused by conditions such as dental caries, periodontitis, or gingivitis.

1. Dental Caries

When dental caries develop in a tooth, black spots may appear on the tooth surface. As the condition progresses, cavities can form. If tooth decay becomes severe, it may cause pain during chewing.

2. Periodontitis

Periodontitis, commonly known as gum disease, can cause localized pain or loose teeth. Contributing factors may include dental calculus, plaque irritation, long-standing diabetes, smoking, and other related factors.

3. Gingivitis

Gingivitis refers to inflammation and irritation of the gums. The affected gum tissue often appears dark red, bright red, or shiny. It may also lead to localized pain.

Besides the above causes, pain during biting may also result from excessive stomach fire, periapical periodontitis, or other conditions. It is recommended to visit a reputable hospital for a comprehensive examination.