Reversible pulpitis is characterised by intermittent, brief discomfort initiated by a hot, cold or sweet stimulus. The pain evoked is of short duration and there is no lingering or spontaneous pain. The pain ceases within a short period after removal of the stimulus. With a reversible pulpitis, sleep is usually not affected and no analgesics are necessary.  Usually, no apical change is evident on the radiograph. Pulp vitality tests are positive and it is possible to preserve a healthy vital pulp.