Pityriasis Rosea: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Pityriasis Rosea?
A dermatologist, a doctor who treats skin conditions, can tell you what is causing your rash. A primary care doctor, a doctor who handles everyday health problems, can also diagnose pityriasis rosea. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is pityriasis rosea?
Pityriasis rosea is a common skin rash. It is most often seen in young adults. The rash is harmless and usually goes away on its own.
It is not contagious. You cannot catch it from another person, and you cannot spread it to others.
Symptoms
The rash comes in two stages. The first stage is a single scaly patch called a herald patch. It is usually oval or round and slightly raised, and about 2cm to 5cm across. It usually appears on the chest, thigh, upper arm, or neck, but it can appear anywhere on the body.
The second stage is a widespread rash of small, scaly spots. It appears about 5 to 15 days after the herald patch. It usually shows up on the chest and back, but it can appear on the arms or legs. In children, it may appear on the face or scalp. The spots:
- Are often pink or pale red, and can be grey, dark brown, or black on brown or black skin.
- Are oval in shape and may be scaly.
- May follow lines in the skin or appear in a Christmas tree pattern.
- May itch.
Some people also have a headache, tiredness, a sore throat, or a mild fever.
An episode most often lasts 4 to 8 weeks. Symptoms may disappear by 3 weeks or last as long as 12 weeks. After the rash is gone, you may have some darker or lighter areas of skin. In most people, these go back to normal within a few months and do not leave permanent scarring.
Causes and who gets it
The exact cause is not known. Research suggests that a virus causes this skin condition. Some people get it after an illness caused by a virus. It occurs most often in the fall and spring.
You are most likely to get it between 10 and 35 years of age, but it can happen at any age. Most people who get it are otherwise healthy.
Some medicines and vaccines can cause a rash that looks like pityriasis rosea. This rash is not true pityriasis rosea. It is a reaction to the medicine or vaccine.
How doctors diagnose it
A health care provider can often diagnose pityriasis rosea by the way the rash looks. In rare cases, more tests are needed. One is a blood test to be sure the rash is not a form of syphilis, which can cause a similar rash. Another is a skin biopsy, where a doctor takes a tiny piece of skin to study it.
Other conditions can look similar. Scaly spots could be psoriasis or eczema, and a single round patch could be ringworm. A board-certified dermatologist can tell you what is causing your rash.
Treatment
If symptoms are mild, you may not need treatment. The rash usually goes away on its own. If you want relief, your provider may suggest:
- Gentle bathing.
- Mild lubricants or creams to soothe the skin.
- Mild hydrocortisone creams.
- Antihistamines taken by mouth to reduce itching. These are medicines that calm itching, and you can buy them at the store without a prescription.
Moderate sun exposure or ultraviolet (UV) light treatment may help the rash go away more quickly. You must be careful to avoid sunburn. If treatments do not work or the rash is severe, a doctor may recommend steroid cream or refer you to a dermatologist.
When to see a doctor
If you are pregnant and have a new rash, call your doctor, midwife, or maternity unit right away. Getting pityriasis rosea in the first 15 weeks of pregnancy has been linked with miscarriage and premature birth.
Contact your provider if you have symptoms of pityriasis rosea. See a doctor if the rash is still itchy after trying treatments like moisturizers or antihistamines. Also see a doctor if the rash has not gone away after 3 months.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Such a doctor can look at the rash, check for look-alike conditions, and suggest ways to ease the itch. A doctor like this can also check in if the rash lasts and refer you to a dermatologist when needed.
Common questions
Is pityriasis rosea contagious?
No, it is not contagious. You cannot catch it from another person, and you cannot spread it to others.
How long does pityriasis rosea last?
It most often lasts 4 to 8 weeks. Symptoms may disappear by 3 weeks or last as long as 12 weeks.
Does pityriasis rosea leave scars?
No, it usually clears without leaving scars.
Can pityriasis rosea come back?
It usually does not come back. Many people get pityriasis rosea only once.
Can pityriasis rosea be prevented?
No, it cannot be prevented. The exact cause is not known, so there is no known way to prevent it.
Sources
- MedlinePlus - Pityriasis rosea
- NHS - Pityriasis rosea
- American Academy of Dermatology - Pityriasis rosea: FAQs
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
