The pigmentation left by pityriasis rosea can subside, the disease is self-limiting, the prognosis is good, and active treatment can shorten the course of the disease. Pityriasis rosea is an inflammatory skin disease of undetermined cause, manifested as red macules, macules, with furfuraceous scales on the surface, preferably in the proximal limbs, trunk. The disease is self-limiting, and the hyperpigmentation that remains after the rash subsides can fade over time without leaving a scar. Post-inflammatory hyperpigmentation can be faded by sun protection and increased moisturization, and can gradually subside over six months or more. The presence of pityriasis rosea should be reasonably treated under the guidance of a doctor.