<unk>  on torso The symptoms of this condition include: * Recent upper respiratory tract infections in 8–69% of patients have been reported by some studies. * Occasionally,<unk> odromal flu-like symptoms, including headache, joint pain, mild fever, and fatigue, as well as gastrointestinal symptoms such as nausea, diarrhea, or vomiting, and feeling generally unwell,<unk> ecede other symptoms. * In most cases, a single, 2 to 10cm (1" to 4") oval red "herald" patch appears, classically on the trunk or neck, having an appearance similar to ringworm. Occasionally, the herald patch may occur in a hidden position (in the armpit, for example) and not be noticed immediately. The herald patch may also appear as a cluster of smaller oval spots, and be mistaken for acne. Rarely, it does not become<unk> esent at all. * After the herald patch appears, usually some days or weeks later, a rash of many small (5–10 mm; ¼" to ½") pink or red, flaky, oval or round spots appear. They are mostly situated on the trunk and upper limbs. They follow the skin's cleavage lines, which on the upper chest and back<unk> oduce a characteristic "christmas-tree" distribution. * In 6% of cases an "inverse" distribution may occur, with rash mostly on the extremities. In children,<unk> esentation can be atypical or inverse, and the course is typically milder. * About one in four people with<unk>  have mild to severe symptomatic itching. (Moderate itching due to skin over-dryness is much more common, especially if soap is used to cleanse the affected areas.) The itching is often non-specific, and worsens if scratched. This tends to fade as the rash develops and does not usually last through the entire course of the disease. About a fifth of cases have an atypical form, with significant variations in symptoms including the size, distribution, morphology, and evolution of the lesions. In addition to typical papules and scales, forms appearing as very large plaques<unk>  gigantea), urticaria, large blisters, patches resembling erythema multiforme, oral lesions, and various other appearances have been noted. A vesicular form can mimic chicken pox. Variations in distribution include inverted forms, with rashes on the face or extremities without appearing on the trunk, as well as more uncommon versions localized to the armpits, groin, or extremities<unk>  circinata et marginata of Vidal) or unilateral spread.
Pityriasis rosea
Exanthem
Pityriasis alba
Tinea versicolor
Alopecia mucinosa
Nummular dermatitis
Pityriasis amiantacea
Tinea corporis