Gingivitis is a common but often overlooked oral health issue that can lead to more serious problems if left untreated. Recognizing the signs and symptoms of gingivitis is crucial in preventing its progression to periodontitis, a more severe form of gum disease. This post will explore how to recognize gingivitis, what causes it and how to treat and prevent it for a healthy smile. Signs and Symptoms of Gingivitis: One of the most common signs of gingivitis is red, swollen and tender gums.