According to your description, in principle, we should first check the blood, to exclude systemic diseases.

Blood tests are not abnormal, then the main consideration is periodontitis.

The prolonged stimulation of plaque and tartar leads to inflammation and congestion of the periodontal tissues.

At this time, when physical stimulation (brushing teeth) or thermal stimulation (hot food), body odor changes (when sleeping), it is easy to bleed.

Even spontaneous bleeding.

In addition, hormonal changes during menstruation and pregnancy in women tend to aggravate the symptoms of bleeding.

Need to go to a dental specialist for treatment.

1. Dental cleaning to remove tartar plaque and remove the cause of periodontitis.

2. Pay attention to oral hygiene to prevent the re-formation of the cause of the disease. (You can use some mouthwash, and now there are also herbal ingredients)

3. Apply anti-inflammatory drugs, can be topical + oral anti-inflammatory drugs (can be omitted if it is not serious)

4. Supplemental VC, that is, supplemental gum nutrients, to improve its immunity, and to promote the recovery of periodontal disease. (Just eat more fruits)