What Are The Symptoms And Treatment For Pityriasis Rosea?

hello, i have pityriasis rosea for about seven months. It lasted more than it should, i guess. Also my tsh level look high, 4.62IU/ml. My new treatment has begun with rulid antiboitics, and dermovate cream... doc said if they don't look better in 15 days she should make a biopsy. I am also a keloid patient, so I don't want anywhere to be cut on my body. I had the herald patch in Sept, and my bpdy flared up in the beginning of Nov. I have also some white spots on my arms. (not too many though) ıs it really pityriasis rosea? And should I have the biopsy?