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When your gums bleed — how professional cleaning, gum treatment and gum surgery differ

By D-day Dental ClinicPublished September 12, 2026

When you see blood while brushing, most people go no further than wondering whether to switch to a softer toothbrush. But bleeding gums can be the first sign of periodontal disease, and depending on the stage it may end with a professional cleaning, or it may go on to gum treatment or gum surgery. Here is what separates the three.

Where does bleeding from the gums start?

The D-day Dental Clinic website explains how periodontitis develops as follows. Saliva contains a component called glycoprotein, which forms an acquired pellicle on the tooth surface; bacteria gather on that pellicle to form a bacterial film, which then progresses into plaque and tartar. When the gathered bacteria cause inflammation in the tissue around the tooth — the gingiva, the periodontal ligament, the alveolar bone and so on — and that tissue is destroyed, that is periodontitis.

In other words, bleeding may not be a sign that the gums are weak but a sign that inflammation is present.

The symptoms change with the stage

  1. Gingivitis — the gums redden and bleed from time to time while brushing. They may also swell.
  2. Early to moderate periodontitis — bad breath worsens, the gums bleed while brushing and the teeth feel as if they move.
  3. Advanced periodontitis — pus comes from the gums or they swell, the jawbone dissolves and the teeth become loose.

The D-day Dental Clinic website notes that you feel no pain or particular symptom until periodontal disease has already progressed to some degree. Not hurting may not mean that all is well.

How do professional cleaning, gum treatment and gum surgery differ?

Professional cleaning (scaling)

The first-line periodontal treatment for preventing periodontal disease. Plaque, tartar and deposits on the tooth surface are removed with an ultrasonic instrument.

Subgingival curettage (gum treatment)

The periodontal treatment considered after professional cleaning when periodontitis has progressed. The gum is locally anesthetized and instruments are used to remove tartar and inflammation below the gum line directly.

Flap curettage (gum surgery)

The periodontal treatment considered when periodontitis has progressed severely and gum treatment cannot reach it. The gum is incised to expose the tooth root and the jawbone, and tartar and inflammation are then removed.

The three are less three different treatments than different ways of reaching the inflammation, depending on how far down it has gone. Which treatment is needed is decided after an examination.

Prevention is simpler than you might think

The D-day Dental Clinic website notes that periodontal disease can be prevented well enough by correct brushing habits and regular professional cleaning alone. That said, correct brushing is often not achieved, and tartar forms even when it is.

That is why it explains that it matters to come in and have your brushing habits and the state of your gums checked, and to have a professional cleaning at regular intervals. In the table on the website, periodontal treatment is shown as 3 visits with an average duration of 1 month, and the actual schedule differs with your condition.

The state of your gums also changes the order of other treatments

The state of the gums is not only a gum matter. The D-day Dental Clinic website lists, as the first case in which bone grafting is needed, "where the jawbone has been resorbed because of periodontal disease". If you are planning an implant, it may be necessary to deal with gum inflammation first.

Is there something you need checked? If your gums bleed repeatedly, please have your current condition looked at first.

Please note · This article is general information to help you understand what happens in the treatment room. It does not replace a diagnosis or a prescription. If you have symptoms, please come in for an examination and a consultation.

Written and medically reviewed by

Dr. Oh Tae-hoon Director, D-day Dental Clinic

This column was written and medically reviewed by Dr. Oh Tae-hoon, Director of D-day Dental Clinic. Dr. Oh is a board-certified specialist in Integrated Dentistry (통합치의학과) certified by the Ministry of Health and Welfare, holds a master's degree in Oral and Maxillofacial Surgery from Korea University, and served as director of conservative dentistry at Perfect Dental Clinic.

  • Board-certified specialist in Integrated Dentistry, certified by the Ministry of Health and Welfare
  • Master's degree in Oral and Maxillofacial Surgery, Korea University
  • Full member, America Acad emy of Implant Dentistry
  • Full member, Korean Academy of Prosthodontics
  • Full member, Korean Academy of Integrated Dentistry
Last reviewed 2026-09-12 · written and medically reviewed by Dr. Oh Tae-hoon, Director

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