After taking a bite out of a pear yesterday, one of my teeth began hurting whenever i bite down on something. will the pain go away on its own?

Tooth pain: I can't tell you how long this pain will last, it depends on the cause. And this can be determined by a dental exam. If you pain is moderate or high and long lasting see a dentist ASAP.

Possibly: If the tooth in question, however, has a loose filling or a carious lesion, it needs to be restored. Please see your dentist. These issues will not resolve on their own.

Depends: Depends on what's causing the pain. In all probability, however, you will need to see a Dentist for care. Please go now before problem worsens.

Tooth pain: I wish we could tell you without seeing you but unfortunately that's impossible. Sometimes there's just a "jolt" to the tooth & the pain goes away within hours or days. Other times there can be a problem with the tooth, from a simple fix to a more involved treatment. The only way to know for sure is to see your own dentist in order to determine that. Even if the pain goes away, could be a problem

See below : Most likely it is nothing, if you are concerned and the pain is lingering, contact your dentist to make sure that caries is not evident and no periodontal disease exists.

Probably: If it doesn't feel better in a week, go see Your dentist.