Starts with a Herald Patch - single oval scaly plaque 2-3 cm in diameter - then spreading to the trunk with individual papules distributed in parallel to the ribs, may have a collarette of scale. The peak incidence is in spring and autumn. The rash is lighter pink in colour than, say, psoriasis. Self-limiting eruption, gets better in about 6 weeks. Pityriasis versicolor is completely different: yeast infection results in hypopigmented areas on the body more apparent when surrounding areas tan after sun exposure.