Both tooth sensitivity and tooth infection can cause real discomfort — but they are very different problems that call for very different treatment. Knowing which one you’re dealing with could save you time, pain, and worry.
Tooth Sensitivity
- Short, sharp pain when triggered
- Triggered by hot, cold, sweet or acidic foods
- Pain fades quickly once trigger is removed
- Caused by worn enamel or receding gums
- Manageable with desensitising toothpaste
Tooth Infection
- Severe, throbbing, persistent pain
- Pain can spread to jaw or ear
- Gets worse over time — often disrupts sleep
- May occur without any obvious trigger
- Requires urgent dental treatment
Understanding Tooth Sensitivity
Tooth sensitivity usually presents as a short, sharp pain triggered by hot, cold, sweet, or acidic foods and drinks. It typically occurs when the protective enamel on your teeth has been worn down, or when gums have receded — both of which expose the inner, more sensitive part of the tooth.
The key characteristic of sensitivity is that the pain is fleeting. It arrives quickly and dissipates just as fast once the trigger is removed. While it can be uncomfortable, it doesn’t tend to linger or escalate on its own.
In many cases, sensitive teeth can be managed at home with desensitising toothpaste and a good oral hygiene routine. That said, it’s always worth mentioning to your dentist, as persistent sensitivity may point to an underlying issue that needs attention.
Recognising a Tooth Infection
A tooth infection — often referred to as a dental abscess — is a more serious condition. Rather than a brief, triggered twinge, the pain from an infection tends to be persistent and throbbing. It can spread beyond the tooth itself, radiating towards the jaw or ear, and it frequently worsens over time rather than easing up.
One of the telling signs is that the pain often has no obvious trigger. It may wake you in the night or make it difficult to concentrate during the day. You might also notice swelling around the tooth or jaw, a bad taste in your mouth, or a fever — all of which point to infection.
Crucially, a tooth infection will not resolve on its own. Without treatment, it can spread and become a serious health risk. If you suspect you have an abscess, seeking prompt dental care is essential.
Not sure what’s causing your pain?
If you’re unsure whether your discomfort is sensitivity or something more serious, our Emergency Dentist in Harpenden is here to help. We can assess your symptoms, provide clear guidance, and arrange urgent care when it’s needed.
