Gums red but not swollen and not painful, may be physical stimulation, may also be gingivitis, calculus and other reasons.
1. Physical stimulation: for example, by the external force extrusion injury or take too hot and spicy food, may cause red gums, but not swelling and pain.
2. Gingivitis: not pay attention to oral hygiene, plaque, calculus and other causes of gingivitis, may cause redness of the gums, but not swelling and pain.
3. Dental calculus: long-term stimulation of dental calculus may also lead to redness of the gums, but not swollen and pain.
Gums red, but not swollen and pain, there may be other reasons, need to go to the hospital in time to check, clear cause.