Pityriasis rosea

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Medical condition Pityriasis rosea Other names Pityriasis rosea Gibert Pityriasis rosea on the back showing a "christmas tree" pattern Single red and slightly scaly area, followed Usual onset 10 to 35 years old Duration Less than three months Causes Unclear Based on symptoms Treatment Frequency 1.3% (at some point in time) Pityriasis rosea is a type of While the cause is not entirely clear, it is believed to be related to Evidence for specific treatment is limited. Signs and symptoms [ ] The symptoms of this condition include: • Recent • Occasionally, • 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 • After the herald patch appears, usually some days or weeks later, a rash of many small (5–10mm; 1⁄ 4" to 1⁄ 2") pink or red, flaky, oval or round spots appear. They are mostly situated on the trunk and upper limbs. They follow the skin's • In 6% of cases an "inverse" distribution may occur, with rash mostly on the extremities. • About one in four people with PR 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 includi...

The condition classically begins with a single, primary, 2- to 10-cm herald patch that appears on the trunk or proximal limbs. A general centripetal eruption of 0.5- to 2-cm rose- or fawn-colored oval papules and plaques follows within 7 to 14 days. The lesions have a scaly, slightly raised border (collarette) and resemble ringworm ( Tinea Corporis (Body Ringworm) Tinea corporis is a dermatophyte infection of the face, trunk, and extremities. Diagnosis is by clinical appearance and by examination of skin scrapings on potassium hydroxide wet mount. Treatment... read more ). Most patients itch, occasionally severely. Papules may dominate with little or no scaling in children and pregnant women. The rose or fawn color is not as evident in patients with darker skin; children more commonly have inverse pityriasis rosea (lesions in the axillae or groin that spread centrifugally). Diagnostic tests for syphilis Syphilis is caused by the spirochete Treponema pallidum and is characterized by 3 sequential symptomatic stages separated by periods of asymptomatic latent infection. Common manifestations... read more is indicated when the palms or soles are affected, when a herald patch is not seen, or when lesions occur in an unusual sequence or distribution. Treatment of Pityriasis Rosea Some data suggest that acyclovir 800 mg orally 5 times a day for 7 days may be helpful in patients who present early and have widespread disease, or present with flu-like symptoms. Of note, pityriasis r...

Overview Pityriasis rosea rash around the neck and collarbone What is pityriasis rosea? Pityriasis rosea (pih-tuh-RY-uh-sis ROH-zee-uh) is a common skin condition that causes patches of your skin to develop raised, scaly rashes. It may appear on any part of your body, but it usually appears on the trunk (torso), arms and legs. “Pityriasis” means “scaly,” and “rosea” means “pink,” but the rashes may look red, gray, brown or purple. Pityriasis rosea is also known as Christmas tree rash. Who does pityriasis rosea affect? Anyone can get pityriasis rosea. You may be more likely to develop it if you’re: • Between the ages of 10 and 35. • A woman. Women are 50% more likely to develop pityriasis rosea. In some cases, people with pityriasis rosea report that they had significant or long-term Pityriasis rosea doesn’t usually affect people over the age of 60. However, if it does, the symptoms may last for a longer period. How does pityriasis rosea affect my body? Pityriasis rosea commonly affects the skin on your trunk, arms or legs. A variant called inverse pityriasis rosea can affect the skin on your neck, face, armpits (axillae) and groin, though it isn’t common. Your skin may develop discolored patches (lesions) that look like scales or dry, crinkly paper. The patches may itch. Symptoms and Causes What are the symptoms of pityriasis rosea? The symptoms of pityriasis rosea usually develop in stages: • You may initially develop a fever, headache or upper respiratory infection. • Yo...

Pityriasis rosea is a common self-limiting rash that usually starts with a herald patch on the trunk and progresses along the Langer lines to a generalized rash over the trunk and limbs. The diagnosis is based on clinical and physical examination findings. The herald patch is an erythematous lesion with an elevated border and depressed center. The generalized rash usually presents two weeks after the herald patch. Patients can develop general malaise, fatigue, nausea, headaches, joint pain, enlarged lymph nodes, fever, and sore throat before or during the course of the rash. The differential diagnosis includes secondary syphilis, seborrheic dermatitis, nummular eczema, pityriasis lichenoides chronica, tinea corporis, viral exanthems, lichen planus, and pityriasis rosea–like eruption associated with certain medications. Treatment is aimed at controlling symptoms and consists of corticosteroids or antihistamines. In some cases, acyclovir can be used to treat symptoms and reduce the length of disease. Ultraviolet phototherapy can also be considered for severe cases. Pityriasis rosea during pregnancy has been linked to spontaneous abortions. Clinical recommendation Evidence rating References Symptoms of pityriasis rosea can be managed with oral or topical corticosteroids or oral antihistamines. C Macrolide antibiotics have no benefit in the management of pityriasis rosea. B – Acyclovir is effective in the treatment of pityriasis rosea and may be considered in severe cases. B –...