That brief twinge when you sip something cold is easy to brush off, especially if it goes away quickly. Tooth sensitivity can have more than one cause, so a single sensation is not enough to tell you what is happening. Notice when it occurs and whether the pattern changes.
Look for the Pattern
Pay attention to what brings the feeling on, such as a cold drink, sweet food, or brushing, and whether it fades promptly or lingers. Note if it seems to come from one particular tooth or happens in several places. These details can help you describe the concern clearly at a dental visit, though they cannot identify the cause on their own.
Keep Care Gentle
Do not stop brushing the area just because it feels sensitive; keeping up a gentle routine matters. Use a soft-bristled brush and avoid pressing hard, and ask a dental professional whether a toothpaste made for sensitivity may be appropriate for you. Different causes can call for different advice, so avoid treating a product as a substitute for an exam.
Know When to Ask
Arrange a dental appointment if sensitivity persists, worsens, keeps returning, or starts without an obvious trigger. Contact a dental professional promptly if you have significant pain or other new symptoms. You do not need to work out the explanation before asking; describing what you feel and when it happens is a useful place to start.