The hand, foot, and mouth disease (HFMD) rash starts as small, flat red or pink spots that develop into fluid-filled blisters over one to two days. These blisters are typically oval-shaped, a few millimeters across, and appear most commonly on the palms of the hands, soles of the feet, and inside the mouth. The rash can look different depending on where it shows up on the body, how severe the illness is, and your skin tone.
How the Rash Looks on Hands and Feet
On the palms and soles, the rash typically begins as flat, pink or pale spots. Over the next day or two, these spots grow into small, raised blisters filled with clear or grayish fluid. They tend to be oval-shaped and feel tender to the touch. The blisters usually don’t itch the way a chickenpox rash does, but they can be sore, especially on the soles of the feet where pressure from walking makes them uncomfortable.
On darker skin tones, the early flat spots may appear more purple, brown, or grayish rather than the classic pink or red. The fluid-filled blisters themselves still look similar across skin tones, but the surrounding skin changes can be harder to spot if you’re expecting a bright red rash. Looking for the raised, blister-like texture and the characteristic palm-and-sole location is more reliable than looking for redness alone.
Mouth Sores
The mouth sores are often the most painful part of HFMD. They start as small red spots on the tongue, the insides of the cheeks, and the roof of the mouth. These spots quickly blister and then break open into shallow ulcers with a whitish or grayish base. Sores can also form on the gums, the back of the throat, and around the lips.
Because these ulcers hurt, children with HFMD often refuse food, drool more than usual, and cry during meals. Cold liquids and soft foods are easier to tolerate than anything acidic or salty. The mouth sores typically heal within seven to ten days without scarring.
Other Locations on the Body
While the name suggests the rash sticks to the hands, feet, and mouth, it frequently shows up in other places. The buttocks are a common secondary location, especially in toddlers still wearing diapers. The rash can also spread to the legs, arms, and around the mouth on the outside of the face. In these areas, the spots tend to look similar to those on the hands and feet: flat pink or red marks that may or may not develop into blisters.
Atypical or Severe Rashes
Some strains of the virus, particularly one called Coxsackievirus A6, cause a much more dramatic rash that can be alarming. Instead of staying limited to the hands, feet, and mouth, this version can spread across the trunk, arms, legs, genitalia, and the skin around the mouth. The blisters may be larger, and some develop a bulls-eye pattern with a darker center and lighter ring. In children who already have eczema, the virus can cause a widespread eruption of crusty, inflamed lesions in areas where their eczema normally flares. This presentation, sometimes called eczema coxsackium, can look more like a severe eczema outbreak than a typical HFMD rash.
These atypical cases still resolve on their own, but they look enough like chickenpox or a bacterial skin infection that they’re easy to misidentify. The key distinguishing feature is location: HFMD strongly favors the palms and soles, while chickenpox blisters concentrate on the trunk and rarely appear on the palms.
How the Rash Changes Over Time
HFMD follows a predictable pattern. A fever and sore throat usually come first, lasting one to two days. The mouth sores appear next, followed closely by the skin rash on the hands, feet, and other areas. The blisters on the skin typically peak around days three to five of the illness, then gradually flatten and dry out. Most skin blisters peel off within about seven days and heal without leaving scars.
One surprising after-effect: weeks after the rash has completely healed, some children (and adults) notice their fingernails or toenails start to peel, crack, or even fall off entirely. This nail shedding usually happens four to eight weeks after the illness and looks worse than it is. The nails grow back normally over the following months.
How HFMD Rash Differs From Chickenpox
The two rashes are easy to confuse at a glance, but they have distinct patterns. Chickenpox blisters are intensely itchy and appear in waves across the torso, face, and scalp. They rarely show up on the palms or soles. HFMD blisters concentrate on the palms and soles, tend to be more painful than itchy, and are accompanied by mouth sores. Chickenpox blisters also go through stages simultaneously on the same area of skin (some crusted over, some freshly formed), while HFMD blisters in a given area tend to be at roughly the same stage.
When Your Child Can Return to Daycare
The CDC’s guidance is straightforward: children can return to daycare or school when they have no fever, feel well enough to participate, and aren’t drooling uncontrollably from mouth sores. You don’t need to wait for every blister to disappear. The virus spreads most during the first week of illness, primarily through saliva, blister fluid, and stool. Keep in mind that some local health departments have stricter rules during outbreaks, so it’s worth checking your school’s specific policy.