Intraoral dental sinus (also termed a parulis and commonly, a gumboil) is an oral lesion characterized by a soft erythematous papule (red spot) that develops on the

alveolar process The alveolar process () or alveolar bone is the thickened ridge of bone that contains the tooth sockets on the jaw bones (in humans, the maxilla and the mandible). The structures are covered by gums as part of the oral cavity. The synonymous ter ...

in association with a non-vital tooth and accompanying dental abscess. A parulis is made up of inflamed granulation tissue. Less commonly, dental infections drain onto the surface of the skin, forming a cutaneous sinus of dental origin.

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Conditions of the mucous membranes Oral mucosal pathology {{Pathology-stub