Teeth are rotting in your twenties should be treated according to the cause of the disease. Commonly, there are caries, periodontitis, pulpitis, periapical periodontitis, etc. Root canal treatment and extraction treatment can be taken. 1. Dental caries: If not treated in time, cavities will be formed. It can be treated by inlay restoration and amalgam filling. 2. Periodontitis: It is a chronic inflammation that occurs in the periodontium, and may present symptoms such as swelling, redness, and pain in the gums. It can be treated with periodontal sequence therapy, local minocycline gel and other treatments under medical advice, or oral amoxicillin, doxycycline and other medications, and flap surgery and other treatments can be taken if necessary. 3. Pulpitis: mainly manifested as tooth pain, trauma and wear. It can be treated with pulpotomy and root canal therapy. 4. Periapical inflammation: Occlusal pain, swelling and pus flow and other symptoms can occur. Often take the pulp drainage, incision and drainage of pus and other ways of treatment. The teeth are rotten in the twenties, we should go to the hospital in time to avoid delaying the condition. Daily attention should be paid to maintaining oral hygiene and cleanliness, regular cleaning of teeth.