Stages of Periodontal Disease Chart Periodontal Disease Stages and Symptoms – There are four periodontal disease stages or levels. The first stage is what is known as gingivitis. This is the mildest stage of a periodontal disease where only a few symptoms occur. Red and swelling gums, occasional bad breath, and bleeding when brushing may indicate that a person has gingivitis. Sometimes, the symptoms are not noticeable that some people do not know they have a gingival infection. When they know, it already progresses to the next stages. Knowing that there is a problem with your oral health in the first stage can prevent it to develop to further levels. In this level, plaque forms around the base of the teeth. This area is called sulcus.