Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: Jul 18th, 2025

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Gingivitis is gum inflammation. It's also the first stage in periodontal disease. The gums may become reddish or purple and slightly swollen. They may be tender and they may bleed easily. You may have a sour taste, and your breath may be offensive. You may have no symptoms.

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