PUPPP rash starts as small, red, raised bumps that appear inside the stretch marks on your abdomen, usually around week 35 of pregnancy. The bumps are intensely itchy and can merge together into larger, hive-like patches, often surrounded by pale, blanched halos. It’s the most common pregnancy-specific rash, affecting about 1 in 200 singleton pregnancies, with significantly higher rates in twin and triplet pregnancies.
How the Rash Looks in Its Early Stage
The first signs are small, swollen, red bumps (papules) clustered within the stretch marks on your belly. Nearly half of cases begin specifically in the stretch marks surrounding the belly button. The bumps themselves are firm and slightly raised, resembling hives. They tend to merge into wider, flat-topped patches called plaques as more appear.
One of the most distinctive visual features is that the belly button area itself stays clear. The rash fills the stretch marks around it but leaves the skin directly at and around the navel untouched. This “umbilical sparing” pattern is one of the easiest ways to visually distinguish PUPPP from other pregnancy rashes.
How the Rash Changes Over Time
PUPPP doesn’t stay looking the same. After the initial bumps and hive-like patches appear, the rash evolves and becomes more varied. You may notice widespread redness, target-shaped lesions (rings within rings, similar to what you’d see with erythema multiforme), tiny fluid-filled blisters, and dry, scaly patches that look more like eczema. This mix of different lesion types happening at once is characteristic of PUPPP and can make it look confusing or alarming, but it’s part of the normal progression.
The larger abdominal plaques can become quite prominent, sometimes covering much of the lower belly. The blanched halos around individual bumps give the rash a distinctive “bumps on pale islands” appearance against otherwise reddened skin.
Where It Spreads on the Body
PUPPP follows a fairly predictable path. It starts in the abdominal stretch marks, then spreads to the buttocks and thighs. From there, it can move to the arms and legs. Lesions on or above the breasts are rare, and the rash almost never appears on the face, palms, or soles of the feet.
About 80% of PUPPP cases show lesions within stretch marks, which is a helpful identifying feature. If a pregnancy rash is concentrated around the belly button itself rather than in the surrounding stretch marks, that pattern points more strongly toward a different condition called pemphigoid gestationis, which requires different management.
How It Differs From Pemphigoid Gestationis
The rash most commonly confused with PUPPP is pemphigoid gestationis, a rarer and more serious pregnancy skin condition. Early on, the two can look nearly identical. The key visual differences become clearer over time. Pemphigoid gestationis clusters directly around the belly button (the opposite of PUPPP’s umbilical sparing) and eventually develops into tense, fluid-filled blisters that are larger and more prominent than the tiny vesicles sometimes seen with PUPPP.
If your rash is centered on the belly button rather than in the stretch marks around it, or if you develop large, firm blisters, that’s worth flagging to your provider promptly. PUPPP causes no known harm to the baby, while pemphigoid gestationis can carry additional risks that benefit from closer monitoring.
Who Gets It and When
PUPPP typically appears around week 35 of pregnancy, though it occasionally shows up shortly after delivery. First pregnancies carry the highest risk, and the condition is strongly linked to rapid skin stretching. That connection helps explain why multiple pregnancies see dramatically higher rates: 2.9% of twin pregnancies and 14% of triplet pregnancies in one study, compared to 0.5% of singleton pregnancies.
The condition usually lasts four to six weeks total. In most cases, it clears on its own within days to a few weeks after delivery. It rarely recurs in subsequent pregnancies.
Managing the Itch
The itching with PUPPP can be severe enough to disrupt sleep and daily life. First-line treatment focuses on three things: moisturizers to soothe irritated skin, antihistamines to reduce the itch, and prescription steroid creams to calm the inflammation. Cool compresses and oatmeal baths can offer some additional relief between applications.
For most people, topical steroid creams applied directly to the rash are enough to make the itching manageable. In more severe cases that don’t respond to topical treatment, a short course of oral steroids may be considered. The rash does not leave scars, and once it clears after delivery, the skin returns to normal.