The early signs of gum disease is gingivitis, which shows up as inflamed, red gums. Gums can be puffy, swollen, and bleed easily when brushing, but otherwise doesn't cause much pain. Therefore, it can go undetected for some time.
Periodontitis also doesn't show any symptoms until it becomes more advanced. Like gingivitis, periodontitis shows up as red and bleeding gums, in addition to sensitive teeth, sore gums, and changes in the position of your teeth, pain when chewing, tooth loss, and more.
To prevent gingivitis and periodontitis, as well as maintain overall dental health, it's recommended to "brush and floss every day to remove the bacteria that causes gum disease," according to the CDC. The CDS also recommend to see a dentist for a checkup at least once a year. If you have any of the symptoms of gingivitis or periodontitis, see your dentist more frequently to monitor your teeth.