Pityriasis rosea is a rash that usually begins as a large circular or oval patch on your chest, stomach or back, and it can affect any age group. It is most common between the ages of 10 to 35 years and usually resolves without treatment within 10 weeks.
According to what was mentioned by the site mayoclinic The exact cause of pityriasis rosea is not clear, and some evidence suggests that the rash may be caused by a viral infection, particularly by certain strains of the herpes virus. But it has nothing to do with the herpes virus that causes cold sores. Pityriasis rosea is not believed to be contagious.
Complications of pityriasis rosea are not possible. If symptoms do occur, they may include:
1 severe itching.
2 c The presence of permanent brown spots on the dark skin after the rash has healed.
Pityriasis rosea usually begins with the appearance of a large, slightly raised, scaly patch – called a spot on the back, chest, or abdomen. Before the precursor spot appears, some people experience headache pain, fatigue, fever, or sore throat..
After a few days to a few weeks after the precursor spot begins, you may notice small scaly patches on the back or abdomen that resemble a pine tree pattern. The rash may itch, sometimes severe.
In most cases, rosacea will heal on its own within four to 10 weeks. If the rash does not go away by this time, or the itching is bothersome, talk to your doctor about treatments that can help. The condition ends without scarring and does not usually recur again. Your doctor is a medication. Examples include “corticosteroids, antihistamines, and antiviral drugs”.