Koplik spots (gray–white papules on the buccal mucosa ... This is followed by the acute onset of a rosey pink, nonpruritic macular rash, predominantly on the neck and trunk.

Skin changes typical for PUPPP are erythematous, urticarial plaques, and papules. Rash regression is usually observed within 6 weeks postpartum. Immunologic mechanisms, hormonal abnormalities ...