Tooth abscess symptoms can vary a lot, depending on how advanced the infection is.
At the very start, the symptoms of tooth infection can be very mild. It may be as simple as a tooth that's just a little tender to bite on. Sometimes it's OK to bite on the tooth, but sore if you tap it with your finger.
Either way, it feels different to your other teeth. This could also be due to having bitten on something hard, jarring the tooth.
You'll know within a few days, as a "bruised" tooth generally settles down fairly quickly, whereas symptoms of tooth infection tend to gradually get worse.
As the days go by, the tooth becomes more uncomfortable to pressure. You might even feel as if the tooth is being "pushed out of it's socket" a tiny bit. It seems like you can't avoid the tooth, constantly knocking it with the opposite teeth.
What you might notice is that the tooth is NOT sensitive to temperature extremes at all. You can drink scalding hot coffee or ice-cold soda, and the tooth doesn't hurt. Weird, huh?
Not really. There's no pain on hot or cold because the nerve has died. There is no nerve inside the tooth anymore.
So where's the pain coming from?
The pain is coming from the infection in the jawbone socket where the tooth sits.
When the nerve inside a tooth dies, it shrivels up and then starts to decay. It becomes infected with bacteria. As the bacteria breed, they release toxins that gradually seep out of the tip of the root.
These toxins cause your immune system to set up a reaction, resulting in inflammation. So your dead tooth is sitting in an inflamed socket. No wonder it's sore to touch!
It's like having a big splinter in your finger. The skin is all red and swollen, and touching it is painful. Imagine that redness and swelling around a tooth. This should give you a good idea of tooth abscess symptoms!
As the infection gets worse, the gum next to the tooth may start to feel puffy, or even start to swell up. You could get a lump on the gum, which is quite tender to touch.
Strangely, the tooth itself may become less tender when the gum swells up. This is because the swelling is a result of the infection on the root escaping out through the bone socket, releasing the pressure on the tooth. So now the tooth feels better, but the gum is sore!
Sometimes the gum swelling will pop, letting the infection drain out. You will have a bad taste in your mouth, and feel the swelling going down a bit.
But the infection isn't completely gone.
It's still around the tooth, being fed by the bacteria inside the tooth. You've only got a temporary break from the pain. The infection will build again, and the gum will continue to weep, until you get tooth abscess treatment.
On upper teeth, it's possible for your face to swell up, sometimes enough to close the eye on that side. You'll look like you've done 5 rounds with Mike Tyson! As before, the tooth responsible may be only slightly tender, whereas your cheek is very sore.
On lower back teeth (the molars), a swelling like this tends to come up under your jawline, and can spread into your neck.
This is when things get serious. These infections do not drain on their own. They are too deep. You will need to see a dentist, or go to your local ER.
As you can see, tooth abscess symptoms depend on how advanced the infection is.
At one extreme it's just a slightly uncomfortable tooth, while at the other extreme the symptoms of tooth infection can be very uncomfortable. As always, if you think something's not right, get a dentist to check it as soon as possible.