Hand, foot, and mouth disease (HFMD) starts with small red spots that appear on the tongue, inside the cheeks, and on the gums, then spreads to the hands and feet as flat or slightly raised red spots that may develop into small fluid-filled blisters. The rash is usually not itchy, and the whole process from first fever to visible rash unfolds over just a few days. Here’s what to expect at each stage and where to look.
How the Rash Develops Over Time
HFMD follows a predictable pattern. It typically begins with a fever, sore throat, and general feeling of being unwell. One to two days after the fever starts, painful blister-like sores form in the front of the mouth or throat, on the tongue, gums, and inside the cheeks. These mouth sores start as small red spots, then blister and become quite painful, especially when eating or drinking.
Around the same time or shortly after the mouth sores appear, a skin rash shows up on the palms of the hands, soles of the feet, and sometimes the buttocks, knees, or elbows. The rash looks like flat or slightly raised red spots, sometimes with blisters that have a ring of redness at their base. The blisters are small, typically a few millimeters across, and contain clear fluid. Unlike chickenpox, the rash usually doesn’t itch.
Over the next five to seven days, the blisters dry out on their own. The skin around them may peel as they heal. Most people feel significantly better within seven to ten days without any treatment.
What the Mouth Sores Look Like
The mouth sores are often the most noticeable and uncomfortable part of the illness. They appear as small red spots, usually 2 to 5 millimeters, that quickly turn into shallow ulcers with a grayish or yellowish center and a red border. They concentrate on the tongue, inner cheeks, and gums, mostly toward the front of the mouth.
If sores form mainly in the back of the mouth and throat instead, a related viral illness called herpangina may be the cause rather than classic HFMD. The distinction matters because herpangina typically doesn’t produce the hand and foot rash. In both cases, the mouth pain can make swallowing difficult, which is the main reason young children with HFMD stop eating and drinking and risk dehydration.
Where the Rash Appears on the Body
The classic locations are the palms of the hands and soles of the feet, which is where the disease gets its name. But the rash doesn’t always stay there. It commonly shows up on the buttocks as well, particularly in toddlers and infants still in diapers. The backs of the hands, tops of the feet, and the area around the mouth are also common spots.
On the hands and feet, the spots tend to follow the creases and sides of the fingers and toes. They look like small, oval blisters sitting on a red base. Because the skin on the palms and soles is thicker, blisters in these areas may feel firm rather than soft, and they take a bit longer to resolve than blisters elsewhere.
Atypical Rashes That Spread More Widely
Some strains of the virus, particularly coxsackievirus A6, cause an atypical version of HFMD with a more dramatic rash. Instead of staying limited to the hands, feet, and mouth, the rash can spread across the arms, legs, trunk, buttocks, and genital area. The blisters tend to be larger than the classic version and can resemble chickenpox closely enough to cause confusion.
This atypical presentation was documented in a CDC report on cases in Minnesota, where patients had a varicella-like (chickenpox-like) rash with an unusually wide distribution. The illness still resolves on its own, but the appearance can be alarming, especially if you’re expecting the small, localized spots of typical HFMD. People with eczema may also experience a more widespread and severe rash because their skin barrier is already compromised.
How It Looks on Different Skin Tones
Most medical references describe the rash as “red spots,” which accurately reflects how it appears on lighter skin. On darker skin tones, the spots may appear darker brown, grayish, or purple rather than bright red, making them harder to spot in the early flat-spot stage. The blisters themselves are usually still visible regardless of skin tone because of the raised, fluid-filled texture. Checking the palms and soles can be helpful since the skin in these areas tends to be lighter on most people, making the rash easier to see. The mouth sores look the same regardless of skin color.
What Happens After the Rash Clears
Even after the blisters heal and the rash fades, your body may go through a few more changes. Skin peeling on the fingers, toes, palms, and soles is common in the weeks following infection. It’s painless and temporary, though it can look concerning.
Some people, especially children, lose one or more fingernails or toenails about four to eight weeks after the illness. This condition, called onychomadesis, happens because the infection temporarily disrupts nail growth. The nails loosen and fall off without pain, and new nails grow back normally over the following months. It looks dramatic but causes no lasting damage.
How Long It Stays Contagious
People with HFMD are most contagious during the first week of illness, often before the rash even appears. The virus spreads through saliva, nasal mucus, blister fluid, and stool. Even after symptoms resolve, the virus can linger in stool for days to weeks, which is why thorough handwashing after diaper changes and bathroom visits matters long after a child looks and feels fine.
Children are most contagious in the first few days, sometimes before any visible rash develops. This is part of why outbreaks spread so quickly through daycares and schools. By the time you see the telltale spots, the virus has likely already been shared.