The patient him-/herself often doesn’t notice periodontitis until relatively late. This is due to the fact that it is largely painless and has an insidious progression, which means that affected people do not become aware of it until it is in an advanced stage. However, there are some warning signs you can look out for. The first sign of periodontal disease that most patients notice is regular bleeding gums, e.g. while brushing teeth. By this point, the destruction of the periodontal apparatus has already started, however. It is therefore important to watch out for the body’s warning signals in order to prevent disease progression early enough.