Satellite lesions develop and become incorporated into the initial lesion. Secondary erythrosquamous lesions, termed pintids, develop 3 to 5 months after the satellite lesions. One to 3 years after the appearance of the initial lesion, dyschromic lesions develop at new sites or at the sites of earlier lesions. These lesions are initially red, become brown or yellow, and then acquire a slate-blue to violet hue before gradually becoming white, achromic lesions. Dark-field microscopy of the initial lesions, the pintids, and the late dyschromic lesions reveals treponemes.
Serologic tests are positive.
Treatment is the same as that for yaws.