A common question in any dental office is simple: what does an infected tooth look like? The short answer is that an infected tooth may look darker than nearby teeth, and the gum around it may look swollen, red, or puffy. In some cases, a small bump can form on the gum near the root.
Appearance alone does not confirm an infection. Some infected teeth look almost normal from the outside, especially early on, which is why pain, pressure, bad taste, swelling, or sensitivity matter just as much as what you can see in the mirror. Even without symptoms, inflammation can still be developing, so if you are unsure, your general dentist can evaluate the area.
At The Dental Club in Stratford, CT, our emergency dental team provides the kind of prompt evaluation and urgent dental care this question describes.
An infected tooth can look different from one person to the next. The tooth may appear cracked, badly decayed, or darker than the surrounding teeth, especially if the nerve inside has been damaged.
The nearby gum may look red, shiny, swollen, or raised. Some people notice a small pimple-like bump on the gum, which can be a drainage point called a fistula.
In more advanced cases, swelling can spread beyond the gum line. One cheek may look fuller than the other, or the area under the jaw may feel enlarged and tender.
Many tooth infections hurt, but not all of them cause constant severe pain. Some cause a deep throbbing ache, while others hurt mainly when you bite, chew, or lie down.
A tooth may become very sensitive to hot or cold, and that sensitivity may linger after the trigger is gone. Some people also notice a bad taste in the mouth, unpleasant breath, or fluid draining near the tooth.
Pain can spread beyond the tooth itself. An infected tooth may cause discomfort in the jaw, ear, or side of the face, which is one reason it can be confused with sinus pressure or a headache.
Most tooth infections begin when bacteria enter the inner part of the tooth, called the pulp. The pulp contains nerves and blood vessels, and when it becomes inflamed or infected, pressure builds inside the tooth.
This often starts with a deep cavity, a crack, a leaking old filling, or trauma from an injury. In some cases, advanced gum disease can also let bacteria move deeper around the root.
Once bacteria spread beyond the tooth, an abscess can form. A dental abscess is a pocket of infection, usually near the root tip or in the surrounding gum and bone.
Not every painful tooth is infected. A cracked tooth, an inflamed nerve, sinus-related pressure, gum irritation, or food trapped between teeth can cause similar symptoms.
Likewise, not every dark tooth is actively infected. A tooth can darken after old trauma, and some gum bumps are not abscesses.
That is why dentists usually combine an exam with X-rays and temperature or pressure testing before deciding what is actually going on. In practice, the most useful question is not just what the tooth looks like, but whether the full pattern suggests infection inside or around the tooth.
Some tooth infections can become serious quickly. You should seek prompt dental care or see an emergency dentist if there is significant swelling, worsening pain, pus drainage, or a fever.
Urgent medical evaluation is especially important if swelling is spreading into the face or neck, or if there is trouble opening the mouth, swallowing, or breathing. These are red flags for a potentially spreading infection and should not wait for a routine appointment.
Even if the pain improves, the problem may still be there. A draining infection can temporarily reduce pressure without fixing the source.
A dentist will usually look at the tooth, the gums, and the surrounding tissues, then take an X-ray to check the root and bone. In many offices, the visit also includes tapping on the tooth, checking for mobility, and testing how the tooth responds to temperature.
These steps help show whether the problem is decay, a dying nerve, a crack, gum disease, or an abscess. They also help determine whether the tooth can be saved and which treatment makes the most sense.
Treatment depends on the cause and how far the infection has spread. If the infection is coming from inside the tooth, a root canal may be recommended to remove infected tissue and seal the tooth.
If the tooth is too damaged to restore, extraction may be the safer option. After extraction, tooth restoration can replace the missing tooth.
When swelling or drainage is present, the dentist may also need to treat the infected area directly as part of care. The key point is this: the infection source has to be treated, not just the symptoms.
Home remedies may ease discomfort for a short time, but they do not remove bacteria from inside a damaged tooth. Definitive treatment is what stops the infection from continuing or returning.
If you think a tooth may be infected, schedule a dental evaluation as soon as possible. This is especially important if symptoms are persistent, the area is swollen, or the tooth hurts when biting.
Until you are seen, keep the area clean and avoid chewing on that side if it increases pain. Do not try to pop a gum bump or drain the area at home, because that can worsen irritation and delay proper care.
In a local family dentistry setting, this is one of the most common urgent visits, and it is usually very manageable once the source is identified. Getting checked early often means simpler treatment, faster relief, and less chance of the infection spreading.
If you have severe pain, swelling, or other red-flag symptoms, call The Dental Club in Stratford, CT for emergency dentist care serving Stratford, Bridgeport, and Milford at (203) 378-0182 to schedule.
Yes. Some infected teeth have no obvious visible changes early on. Pain, pressure, swelling, bad taste, or sensitivity may be the first clues.
No. A gum bump can have different causes, including irritation or other dental conditions. Still, a pimple-like bump near a painful tooth deserves prompt evaluation.
No. Some infections cause severe throbbing pain, but others cause mild pressure or only occasional discomfort. In some cases, a draining infection may hurt less even though the problem remains.
The symptoms may come and go, but the underlying source usually does not resolve without dental treatment. If you suspect an infection, it is safest to have it examined.