Tooth Pain
What does a dental abscess feel like?
2 July 2026 · The Dentist, Al Qusais, Dubai
The short answer
A dental abscess typically feels like a deep, throbbing pain that gets worse when you lie down, along with swelling in your gum or face, sensitivity to hot and cold, and sometimes a foul taste from pus draining into your mouth. You may also notice a tender lump on the gum, a bad smell on your breath, and general unwellness with a mild fever. This is an infection that needs treatment within days, not something to wait out.
The pain has a distinct rhythm to it
Abscess pain tends to build rather than come and go. Where a sensitive tooth might sting for a few seconds after cold water, an abscess produces a constant, deep ache that throbs in time with your pulse. It often gets noticeably worse when you lie flat, because blood pools in the area and increases pressure against the nerve. Many patients tell us they can't sleep on the affected side, or wake up because the pain has crept from a dull background ache into something sharp.
Biting down usually makes it worse too. If a tooth has a pocket of infection at its root, pressure pushes on inflamed tissue and sends a jolt through the jaw. Some people describe it as feeling like the tooth is slightly raised, so their bite doesn't quite meet the same way it used to. That sensation is real: swelling at the root tip can push the tooth fractionally out of its socket.
Swelling, taste, and the signs that point to infection rather than just sensitivity
Look for a firm or fluctuant swelling on the gum near the tooth, sometimes described as a boil or pimple. If it ruptures, patients often notice a sudden rush of foul-tasting fluid and a brief drop in pain, which feels like relief but actually means the infection has found a way to drain. That's not a cure. The abscess is still there and will refill unless the tooth is treated.
Facial swelling is a step up in severity. If your cheek, jaw, or the area under your eye is visibly puffy, or if swallowing and opening your mouth fully feels tight and restricted, that infection has spread beyond the tooth into surrounding tissue. Fever, fatigue, and swollen lymph nodes under the jaw often come with this. A persistent bad taste or smell, even without an obvious burst pocket, is also a strong clue that pus is present somewhere along the gumline.
Sensitivity changes are worth noting too. Early on, a dying or infected tooth is often exquisitely sensitive to hot food and drink, more than cold. As the nerve inside dies completely, that sensitivity can paradoxically disappear even though the infection is getting worse, because the nerve can no longer signal pain the way it used to. Reduced pain doesn't mean the problem has resolved.
When this counts as urgent, and what to do about it
Treat any facial swelling, fever, or difficulty swallowing or breathing as urgent. Dental infections can spread into deeper tissues of the neck in rare cases, and that needs same-day attention. Even without those red flags, an abscess won't heal on its own. Antibiotics from a GP can quiet things down temporarily, but the source, whether it's a deep cavity, a cracked tooth, or old decay under a filling, has to be treated directly, usually with a root canal or, if the tooth can't be saved, an extraction followed by discussion of an implant or bridge.
If you're noticing throbbing pain, gum swelling, or an odd taste that won't go away, don't wait for it to get worse. At The Dentist in Al Qusais, Dr. Faris Alkhanafseh and Dr. Mohammad Nour see these cases regularly and can usually get you in quickly to assess the tooth, take an X-ray to see how far the infection has spread, and start treatment the same visit if needed. Call or WhatsApp 056 349 8888, we're open seven days except Sunday, and the first checkup is free for new patients.
This article is general information, not a diagnosis. If you are in Dubai, the free first checkup at our Al Qusais clinic is the fastest way to get an answer about your own teeth.