How is pityriasis rosea diagnosed?

Answer:
Although there is no blood test for pityriasis rosea itself, most primary care physicians will order a rapid plasma reagin (RPR) or Venereal Disease Research Laboratory (VDRL) blood test to screen for syphilis.
First answer by Gale Ency. of Alt Med. Last edit by Gale Ency. of Alt Med. Contributor trust: 16 [recommend contributor recommended]. Question popularity: 3 [recommend question].