Red gums after scaling may be caused by gingivitis, calculus, poor oral hygiene maintenance, etc., which can be treated by maintaining oral hygiene, subgingival scraping, and oral anti-inflammatory and analgesic drugs. 1. Gingivitis: Gingivitis is usually caused by plaque or bacteria buildup on the teeth, and in severe cases, it is possible to have red gums after scaling. Patients can improve by maintaining good oral hygiene, such as brushing in the morning and evening, rinsing after meals. 2. Calculus: Red gums after scaling may be caused by too much calculus in the patient’s mouth and accumulation in the gums. Through the subgingival scraping, the use of fine subgingival scraper scraping tartar and plaque, as well as some inflammatory granulation tissue, to achieve the therapeutic effect. 3. Poor oral maintenance: After scaling, if you still don’t pay attention to maintaining oral hygiene, don’t brush your teeth, brush your teeth incorrectly, etc., the inflammation of the gums will always be there and the gums will be red. When patients appear after scaling gums or red phenomenon, need to go to the regular dental hospital for detailed examination, identify the cause of treatment, such as medication need to follow the doctor’s instructions, do not use drugs privately.