Primary Lesions: Macule Papule Nodule Vesicles Bullar tumors Wheals Secondary Lesions: Erosions Ulcers Fissures Desqumations (excoriations) Primary lesions of Oral Cavity: MACULE: Well circumscribed flat lesions that are noticeable due to the change in color of Skin or Mucosa. Red- Inflamation Pigmented- Melanin, Haemosiderin, foreign material. Ex: Melanotic Macule PAPULES: These are solid lesions raised [&hellip