Hi docs! what could i do about an exposed/open nerve on my back tooth?

Call ur dentist: The tooth either needs root canal therapy or extraction if the nerve is exposed. The sooner you call the sooner the problem will be resolved.

See dentist: See your dentist and have him/her figure out the specifics of the situation. If the exposure is minor then sometimes a bonding can be put over top. If the exposure if more prominent sometimes a root canal is necessary