Question: what are characteristics of primary lesions?
Answer: Macule. A macule is a distinct discoloration of the skin that is flat and smaller than 1 centimeter in diameter. ... 
Papule. A papule is a raised skin area with no visible fluid and sized up to 1 centimeter in diameter. ... 
Nodule. ... 
Tumor. ... 
Plaque. ... 
Vesicle. ... 
Bullae. ... 
Pustule.