PUPPP Rash in Pregnancy: Itchy Stretch-Mark Bumps That Spread

PUPPP rash is an intensely itchy pregnancy-related eruption that often begins as small bumps within abdominal stretch marks. Those bumps may merge into raised, hive-like patches and spread toward the hips, buttocks, thighs, arms, or legs. It most often appears late in pregnancy, although it can occasionally begin shortly after delivery.

While PUPPP is generally considered harmless to the pregnancy, it can be uncomfortable enough to disturb sleep and make daily routines difficult. Because several pregnancy-related and unrelated conditions can cause itching or a rash, a clinician should evaluate new, severe, unusual, or rapidly changing symptoms rather than relying on appearance alone.

Quick answer

• PUPPP stands for pruritic urticarial papules and plaques of pregnancy.
• It commonly begins as itchy bumps inside abdominal stretch marks during the third trimester.
• The rash may spread to the thighs, buttocks, arms, or legs.
• Cool compresses, fragrance-free moisturizer, and loose clothing may help reduce discomfort.
• Ask your pregnancy care provider before using any medication, including over-the-counter creams or antihistamines.

What PUPPP rash is

PUPPP is also known as polymorphic eruption of pregnancy. It is an inflammatory skin eruption associated with pregnancy and is characterized by very itchy papules, or small raised bumps, that may join into larger plaques.

The eruption typically starts within stretch marks on the abdomen. The skin immediately surrounding the belly button is often less affected, although rash patterns can vary. On lighter skin, the patches may look pink or red. On deeper skin tones, they may appear skin-colored, reddish-brown, purplish, or darker than the surrounding skin.

PUPPP is not contagious. Scratching does not make it spread from one body area to another, but repeated scratching can irritate the skin, increase inflammation, and contribute to broken skin.

Why it may start in stretch marks

The exact cause is not fully understood. One leading explanation involves rapid stretching of the abdominal skin and irritation within the connective tissue. This may help explain why the rash often begins in newer stretch marks and why it is more frequently reported late in pregnancy, when abdominal stretching is greatest.

Other proposed influences include hormonal and immune changes. PUPPP has also been reported more often during first pregnancies and pregnancies involving multiples, but having a possible risk factor does not mean someone will develop it.

How the bumps may spread

The first spots are often small, very itchy bumps clustered in abdominal stretch marks. Over time, they may blend into broader raised patches that resemble hives.

The eruption can extend from the abdomen to nearby or more distant areas, including:

• Hips and flanks
• Buttocks
• Upper thighs
• Lower legs
• Arms

The face, palms, soles, and skin directly inside the belly button are less typical locations. A rash that begins in the belly button itself, forms obvious blisters, involves mucous membranes, or follows an unusual pattern deserves prompt medical evaluation because it may represent a different condition.

What you can do at home

Gentle skin care may make itching easier to tolerate while you arrange appropriate medical guidance. Conservative comfort measures include:

• Apply a cool, damp compress for short periods.
• Take a cool or lukewarm shower instead of a hot one.
• Use a fragrance-free moisturizer or bland emollient regularly.
• Wear loose, breathable cotton clothing.
• Avoid fragranced body washes, essential oils, and harsh exfoliants on irritated skin.
• Keep fingernails short to reduce skin damage from scratching.

An oatmeal bath may also feel soothing for some people. Stop using any product that causes burning, increased redness, swelling, or worsening discomfort.

Professional treatment options

A dermatologist, obstetric clinician, or other qualified healthcare professional can examine the distribution and appearance of the rash and consider whether another diagnosis needs to be ruled out. Testing is not always necessary, but additional evaluation may be appropriate when the pattern is atypical.

Depending on the severity, pregnancy stage, medical history, and examination, a clinician may discuss high-level options such as topical anti-inflammatory medication, an oral antihistamine, or other prescription support for severe itching. Medication choices during pregnancy should be personalized and approved by the pregnancy care provider. Do not assume that a product is appropriate simply because it is available without a prescription.

When to see a dermatologist

It is worth getting checked whenever a new pregnancy rash is intense, widespread, persistent, or difficult to identify. Seek timely medical guidance if:

• The itching is severe or repeatedly interrupts sleep.
• The rash spreads quickly or becomes painful.
• Blisters, open sores, drainage, or crusting develop.
• The eruption begins directly in or around the belly button.
• You develop fever, facial swelling, trouble breathing, dizziness, or feel generally unwell.
• You have intense itching with little or no visible rash, especially on the palms or soles.
• You notice yellowing of the skin or eyes, dark urine, pale stools, or upper abdominal discomfort.
• You are unsure whether a medication or topical product is pregnancy-safe.

Severe itching without a typical rash can have causes other than PUPPP and should be discussed promptly with your obstetric clinician.

Frequently asked questions

Does PUPPP rash harm the baby?

PUPPP itself is generally not associated with harm to the baby. However, a clinician should confirm that the symptoms fit PUPPP because other pregnancy-related conditions may require different monitoring or treatment.

Can PUPPP start after delivery?

Yes. Although it most commonly begins late in pregnancy, cases can start shortly after delivery. A postpartum rash should still be evaluated when it is severe, blistering, painful, or otherwise concerning.

Is PUPPP contagious?

No. PUPPP is not an infection and does not spread between people.

Will scratching make PUPPP spread?

Scratching does not cause the underlying eruption to move to other areas, but it can worsen inflammation, damage the skin barrier, and make the itching feel more intense.

How long does PUPPP last?

The duration varies. It commonly improves after delivery and may clear over the following days or weeks. Persistent or worsening symptoms should be reassessed.

Can I use hydrocortisone or an antihistamine while pregnant?

Some topical and oral options may be considered during pregnancy, but the appropriate product, strength, dose, and timing depend on individual factors. Ask your obstetric clinician or dermatologist before starting any medication.

This article is for educational purposes and is not medical advice. For diagnosis and personalized treatment, please book an appointment with a board-certified dermatologist.

Sources & further reading

• Cleveland Clinic – PUPPP Rash: Symptoms, Causes, Treatment & Prevention
• DermNet – Polymorphic eruption of pregnancy