This section is from the book "Dental Medicine. A Manual Of Dental Materia Medica And Therapeutics", by Ferdinand J. S. Gorgas. Also available from Amazon: Dental Medicine.
Chronic Inflammation of the Dental Pulp is indicated by pain, less severe than in the acute form, and of less duration ; coming on at irregular intervals, and wandering, like neuralgic pains, and incited by changes of temperature, and the application of irritants. (See Irritation of Dental Pulp.)