The thought that “having a cavity will always cause some sensitivity or discomfort” is a very big, bad myth. Tooth decay will not generally cause symptoms until it is advanced enough to reach the nerve. Not treating decay in the early stages will lead to much more expensive procedures like root canal therapy. That’s why early detection through regular dental exams and x-rays is so important! We can detect these cavities before they advance into the nerve and repair them with more simple, less expensive treatments.
So, before you decide to wait until it hurts, think of what it may cost you in the end. Remember: once a cavity starts, it will only continue to grow