[Parameter] Time pattern [Reversible pulpitis[8]:36] Pain as long as stimulus is applied Lingering pain to hot or cold or spontaneous pain [Pulp necrosis[8]:37] Absence of pain following days or weeks of intense, well localized pain [Apical periodontitis[8]:37–38] Pain on biting following constant dull, aching pain development [Periodontal abscess] Dull ache with acute increase in pain when tooth is moved, minimal thermal sensitivity [Pericoronitis] Constant dull ache without stimulus [Myofascial pain] Spontaneous, worse with eating, chewing, or movement of jaw [Maxillary sinusitis] Spontaneous, worse when head is tipped forward [Dentin hypersensitivity[8]:36] 
Hypersensitivity as long as stimulus is applied; often worse in cold weather