Only heat? Sensitivity to heat is sometimes an indication that a nerve is dead or dying. Being sensitive to hot and cold is very common and can be due to gum recession/exposed root structure, overly aggressive brushing, decay, leaking restorations. But since you said heat only, does it linger for a period of time? In any case, have your dentist check the area to see that there isn't a problem brewing.
I have a tooth that is sensitive to heat and cold and it also seems to hurt when I bite a certain way. What could cause this?
Nerve involvement. The nerve of the tooth is usually affected when you have heat and bite sensitivity. Only an xray can determine if this is the case. Please seek dental attention as soon as possible. If you have either a cavity or a fractured tooth affecting the nerve, a root canal treatment or extraction may be necessary to resolve your pain. Read more...