The Stages of Gum Disease: Gingivitis to Periodontitis

By Lovik Mirzaeian, DDS. Updated November 2026.

Gum disease progresses through recognizable stages: gingivitis, where the gums are inflamed but no bone has been lost and the damage is fully reversible; early periodontitis, where the infection has begun to destroy the bone and fibers holding the teeth; moderate periodontitis, where pockets deepen and teeth may start to shift; and advanced periodontitis, where bone loss is severe enough that teeth loosen and can be lost. The line that matters most is the one between gingivitis and periodontitis, because that is where the damage stops being reversible.

The frustrating part is that the early stages rarely hurt. Most people find out they have periodontitis at a dental visit, not because of a symptom.

Stage One: Gingivitis

Gingivitis is inflammation of the gum tissue caused by plaque sitting along and just under the gumline. The gums look red instead of pale pink, they may appear slightly puffy, and they bleed when you brush or floss. There is no pain, and the bone and ligament under the gum are untouched.

This stage is completely reversible. Thorough brushing at the gumline, daily flossing, and a professional cleaning to remove hardened tartar will usually return the gums to health within a couple of weeks. If your gums bleed when you clean between them, that is gingivitis talking, and we explained what to do in our post on why gums bleed when you floss. Bleeding is a reason to floss more carefully, not to stop.

Stage Two: Early Periodontitis

When gingivitis is left alone, the inflammation spreads deeper. The gum begins to detach from the tooth, forming a pocket, and the body’s own immune response starts to break down the bone at the edge of the socket. At this point the pockets measure around four to five millimeters, and x-rays show the first small loss of bone height.

Symptoms are still mild. Bleeding continues, breath may be persistently unpleasant, and the gums may look like they have pulled back slightly from the teeth. Treatment moves beyond a regular cleaning to scaling and root planing, sometimes called a deep cleaning, where the root surfaces below the gumline are cleaned and smoothed under local anesthetic. Done at this stage, treatment usually halts the disease, though the small amount of bone already lost does not grow back on its own.

Stage Three: Moderate Periodontitis

The pockets deepen to five or six millimeters or more, and bone loss becomes clearly visible on x-rays. Roots are exposed as the gums recede, which brings sensitivity to cold and makes the teeth look longer. Some teeth may feel slightly loose or seem to have shifted, and gaps can open between front teeth as they drift.

The infection may also cause occasional gum abscesses: painful swellings that come and go. Treatment is more involved. Deep cleaning is still the foundation, sometimes with antibiotics placed in the pockets, and some areas may need minor gum surgery to reach the bottom of deep pockets or to reshape damaged tissue. Our post on stopping receding gums from getting worse covers the recession side of this stage in detail.

Stage Four: Advanced Periodontitis

By this stage a large share of the bone supporting some teeth is gone. Teeth are visibly loose, chewing may be uncomfortable, and pus can appear when the gums are pressed. Pockets of seven millimeters or deeper are common. Teeth may tilt, drift, or fall out.

Treatment focuses on saving what can be saved and planning for what cannot. Some teeth respond well to surgical cleaning and bone regeneration procedures. Others are too far gone and are removed before the infection spreads to their neighbors. Replacement with implants is possible, but only once the disease is under control, since the same bacteria attack the bone around implants.

Why It Progresses Faster in Some People

Nobody knows for certain why one person with average brushing keeps healthy gums while another develops deep pockets in their thirties, but several factors clearly matter. Smoking is the biggest, both because it feeds the disease and because it hides the bleeding that would otherwise be a warning. Diabetes that is not well controlled speeds bone loss considerably; we cover that link in our post on diabetes and your gums. Family history, stress, certain medications, grinding, and hormonal changes all play a role. The American Dental Association lists the main risk factors if you want to check yours.

How We Tell Which Stage You Are In

At a periodontal exam we measure the depth of the pocket around every tooth with a fine probe, note where the gums bleed, check for looseness, and compare bone levels on x-rays. Those numbers, not how the gums feel to you, determine the stage. Healthy pockets measure one to three millimeters. Four and above with bleeding suggests periodontitis. Your hygienist may call these numbers out during the exam, and it is worth asking what yours are.

When to See a Dentist

Bleeding gums, bad breath that will not clear, gums that look longer than they used to, or a tooth that feels even slightly loose are all reasons to book a routine exam soon rather than at your next scheduled visit. Gum disease caught at stage one or two is manageable with cleaning and home care. Caught at stage four, it means extractions. If you have a swollen, painful lump on the gum or facial swelling, treat that as urgent and call the same day.

Frequently Asked Questions

Can gum disease be reversed?

Gingivitis, the first stage, is fully reversible with thorough brushing, daily flossing, and a professional cleaning. Once the disease has progressed to periodontitis and bone has been lost, the damage cannot be reversed, but the disease can usually be stopped from getting worse with deep cleaning and regular maintenance.

What are the first signs of gum disease?

The earliest signs are gums that bleed when you brush or floss, redness or puffiness along the gumline, and breath that stays unpleasant despite brushing. Pain is usually absent in the early stages, which is why many people do not notice until a dentist points it out.

How long does it take gingivitis to turn into periodontitis?

There is no fixed timeline. Some people have gingivitis for years without it progressing, while others, especially smokers or people with uncontrolled diabetes, move to periodontitis within a few years. Regular exams with pocket measurements are the only reliable way to catch the transition.

What does a deep cleaning for gum disease involve?

Scaling and root planing cleans plaque and tartar from the root surfaces below the gumline and smooths the roots so the gum can reattach. It is done under local anesthetic, often over two visits, one side of the mouth at a time. A follow-up visit a few weeks later checks whether the pockets have shrunk.

Bleeding or Receding Gums? Dr. Mirzaeian Can Help

A periodontal exam takes a few minutes and tells you exactly where your gums stand. Please contact us to set up a consultation at our Clovis office, and we will measure your pockets and build a plan for whichever stage you are in.

Lovik Mirzaeian, DDS has achieved extensive training in multidisciplinary dental treatments. His credentials include Dental Implants, Cosmetic Dentistry, Full Mouth Reconstruction, Endodontics, Oral Surgery, Orthodontics, and Sleep Sedation. Our office puts your comfort and smile first, and we are dedicated to giving you top-notch dental care. Get ready to show off your perfect smile!

Looking for a trusted family dentist in Clovis? Dr. Mirzaeian welcomes new patients of all ages.