Gums will cause a hard lump swelling on the face, may be the maxillofacial occurrence of cellulitis, common diseases are periapical abscess, alveolar abscess, wisdom tooth pericoronitis, etc., specific as follows. 1. Periapical abscess: Inflammation of periapical abscess of maxillary incisor or maxillary cuspid can spread to infraorbital space and cause cellulitis, and periapical abscess of maxillary and mandibular molar can spread to buccal space and cause cellulitis. 2. Alveolar abscess: alveolar abscess in the maxillary anterior region may cause infection in the infraorbital space, and alveolar abscess in the mandibular molar region may cause infection in the occlusal space. 3. Wisdom tooth pericoronitis: pericoronitis of the mandibular wisdom tooth may cause infection of the occlusal space and the pterygomandibular space leading to cellulitis. Hard lumps on the face consider that it may be a gap infection caused by toothache, but there may be other reasons, it is recommended to go to the hospital in time.