Pityriasis rosea is generally self-limiting and will resolve on its own after 4 to 8 weeks without treatment.
If you want to get better quickly, you need to follow medical advice on medication, generally commonly used anti-itch medication is loratadine, cyproheptadine and other antihistamines, you can also give vitamin C for oral treatment, and topical medication can also choose furnace glycolic lotion.
In addition, local irradiation with UV light can be considered during the acute phase of inflammation and can promote the reduction of inflammatory symptoms.