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Explore our Skin Problems Image Gallery to learn about Pityriasis Rosea, a skin ailment that causes itching and pain, often mistaken for ringworm. View more skin problem images.
©iStockphoto.com/Vladimir MucibabicImagine waking up one day with an irritating itch. Concerned, you ask a family member to examine a rough patch on your back, only to hear them worryingly mention the possibility of ringworm.
However, there's no need to panic just yet. Ringworm, if that's the case, is treatable. Circular, rough rashes can indicate various conditions such as eczema, psoriasis, or ringworm. A doctor's expertise is crucial for an accurate diagnosis, so consult a professional before drawing conclusions. In this scenario, your doctor surprises you with a diagnosis of pityriasis rosea.
This is a relief -- unlike ringworm, this condition isn't contagious, as pityriasis rosea isn't caused by a fungus. You don't have to worry about spreading that scaly itch to your loved ones. However, there's still a lot to uncover about this condition, including its nature and, most importantly, how to soothe that persistent itch.
Pityriasis rosea begins as a solitary, round patch of dry, flaky skin. Known as the "herald" or "mother" patch, it typically appears on the back, chest, upper arms, or thighs [source: American Academy of Dermatology]. Within a week or two, additional pink spots may develop, usually confined to the torso, neck, arms, and legs. On the back, these patches might spread downward in a pattern resembling a Christmas tree. These areas may or may not itch, but heat and physical activity can intensify the rash.
Before you abandon your exercise routine or apply over-the-counter creams for relief, continue reading to understand the causes and treatment options for pityriasis rosea.
Causes of Pityriasis Rosea
Once diagnosed by a doctor, your next question might be about the cause of this condition. Did you come into contact with an irritant? Could it be a food allergy? Or is it possibly linked to a viral infection?
Diagnosing pityriasis rosea might be simpler than uncovering its exact cause. Since it isn't caused by a fungus or bacterial infection, anti-fungal creams or antibiotics won't help. Even the most skilled doctors can't prescribe a cure to make the rash disappear.
The itchiness of pityriasis rosea can range from mild to severe, leading some to mistake it for an allergic reaction. While the rash's appearance might resemble an allergy, experts haven't confirmed any link to external triggers like food or contact with irritants.
Some researchers believe viruses like human herpesvirus 6 (HHV-6) and 7 (HHV-7) could contribute to pityriasis rosea [source: Schwartz]. However, no viral genetic material or symptoms like fever have been found in patients. Certain medications, such as barbiturates, and pre-existing skin conditions like seborrheic dermatitis or acne, may increase the likelihood of developing this rash.
Even if the cause of your pityriasis rosea remains unclear, you can still manage its symptoms if they cause discomfort. Continue reading to learn how to alleviate this itchy condition.
Pityriasis rosea most commonly affects individuals aged 10 to 35 [source: American Academy of Dermatology]. It's rare in infants and those over 60, with cases peaking in spring and fall in temperate climates. Most outbreaks last six to eight weeks, though they can persist longer. Fortunately, recurrence is uncommon.
Pityriasis Rosea Treatments
After a doctor confirms your pityriasis rosea diagnosis, you’ll likely be told to wait it out, as the condition typically resolves on its own within four to eight weeks. While there’s no way to hasten the healing, there are ways to manage the itching and discomfort during this period.
To alleviate itching, over-the-counter options like hydrocortisone creams and calamine lotion can be effective. Oral antihistamines such as Benadryl may also help, but consult a doctor before use, especially for children, older adults, or those on other medications. For severe itching, a doctor might prescribe corticosteroid treatments. Always seek medical advice for tailored recommendations.
Home remedies can also provide relief. Avoid hot baths and opt for lukewarm showers instead. Oatmeal baths, commonly used for chickenpox or poison ivy, can soothe the skin. After showering, gently pat your skin dry and apply moisturizer to prevent further dryness, which can worsen itching. Additionally, avoid wearing wool or synthetic fabrics; choose breathable materials like cotton or silk to minimize irritation.
While pityriasis rosea can be an unwelcome surprise, rest assured it’s temporary. In the meantime, explore the links below to learn more about this skin condition and how to manage it effectively.
The primary side effect of pityriasis rosea is itching, though other symptoms may occur. Some individuals report headaches or a general feeling of malaise before the rash appears, but these symptoms are less common and affect only a small number of patients. [source: Merck]
