Fifth disease produces a distinctive bright red rash on both cheeks that looks like the child was slapped across the face. This “slapped cheek” rash is the hallmark sign, but it’s actually the second stage of the illness. Before the rash ever appears, most children experience mild flu-like symptoms that can easily be mistaken for a common cold.
Early Symptoms Before the Rash
Fifth disease is caused by parvovirus B19, and it typically starts with symptoms that look nothing like a rash illness. About a week or two before any skin changes show up, children often develop a low-grade fever (usually between 99°F and 101°F), fatigue, headache, achiness, a runny nose, and a sore throat. These early symptoms are mild enough that many parents chalk them up to a regular cold.
Here’s the tricky part: the virus is most contagious during this early, unremarkable phase. By the time the rash appears and you actually recognize it as fifth disease, the child is typically no longer spreading the virus to others.
The “Slapped Cheek” Rash
A few days after the fever and cold-like symptoms fade, the signature facial rash appears. Both cheeks turn a solid, vivid red, as if someone slapped the child hard on each side of the face. The forehead, chin, and nose are usually spared, which makes the cheek redness stand out even more. The skin may feel warm to the touch but generally isn’t painful or itchy.
On lighter skin, the rash is unmistakable: a bright, almost startling red. On brown or Black skin, the rash appears more purplish and can be significantly harder to see. If your child has darker skin, look closely at the cheeks for any subtle color change or slight swelling, and pay attention to whether the area feels warmer than the surrounding skin.
The Lacy Body Rash
Within a few days of the facial rash, a second rash often spreads to the trunk, arms, and legs. This one looks completely different from the solid red cheeks. It forms a lace-like or net-like pattern on the skin, with patches of pink or red connected in a web-like design with lighter skin visible through the gaps. Some parents describe it as looking like a doily or fishnet pattern pressed against the skin.
This lacy rash is usually flat, not raised, and it tends to be more noticeable on the arms and thighs. It can be mildly itchy for some children, though many don’t notice it at all. The combination of slapped-looking cheeks followed by a lace-patterned body rash is what makes fifth disease visually distinct from other childhood rash illnesses.
How Long the Rash Lasts
The rash typically clears up within 7 to 10 days, but it has a well-known habit of coming and going for up to three weeks. Just when you think it’s finally gone, it can flare back up. Several environmental triggers can bring the rash back or make it more noticeable: heat, cold, sunlight, exercise, skin rubbing, and even stress. A child might look completely clear in the morning and then develop visible redness again after playing outside in the sun or taking a warm bath.
This on-and-off pattern doesn’t mean the infection is getting worse or that the child is sick again. It’s simply the skin reacting to stimulation while it finishes recovering. The rash will eventually stop recurring on its own without any treatment.
How It Looks Different From Similar Rashes
Several childhood illnesses cause red rashes, so it helps to know what sets fifth disease apart:
- Scarlet fever produces a rough, sandpaper-textured rash that usually starts on the chest and spreads outward. It comes with a high fever, a “strawberry tongue” (red and bumpy), and a sore throat. The texture is the giveaway: scarlet fever feels gritty, while fifth disease is smooth.
- Allergic reactions often cause hives, which are raised welts that can appear anywhere and shift location within hours. Fifth disease rashes stay flat and follow a predictable face-then-body pattern.
- Measles starts with a rash behind the ears that moves down the body, accompanied by high fever, cough, and red eyes. The spots are typically raised and can merge together, unlike the lacy pattern of fifth disease.
The most reliable visual clue for fifth disease is the sequence: solid red cheeks first, followed days later by a lacy rash on the body.
How Fifth Disease Looks in Adults
Adults can catch parvovirus B19 too, but the rash often looks different or doesn’t appear at all. The classic slapped-cheek look is far more common in children. When adults do develop a rash, it tends to be the lacy body pattern without the dramatic facial redness. The more noticeable symptom in adults is joint pain and stiffness, particularly in the hands, wrists, and knees, which can last for weeks. Some adults experience only the joint symptoms with no visible rash, making the infection easy to mistake for something else entirely.