Hand, foot, and mouth disease (HFMD) starts with small red spots or tiny bumps that develop into blisters, typically appearing first in the mouth and then on the palms of the hands and soles of the feet. The rash can look different depending on skin tone: red, white, gray, or simply tiny raised bumps. Here’s what to expect at each stage and how to tell it apart from other rashes.
The First Signs: Flu-Like Symptoms
Before any visible rash appears, the illness usually begins with a mild fever, sore throat, and loss of appetite. These early symptoms feel like the start of a common cold and typically last a couple of days. After that initial phase, the characteristic spots and sores begin showing up.
What the Mouth Sores Look Like
Painful sores can develop anywhere in and around the mouth, including the tongue, gums, inner cheeks, and roof of the mouth. They usually start as bright pink spots or tiny bumps that turn into blisters. Once those blisters break open, they leave behind shallow, painful ulcers that make eating and drinking uncomfortable, especially for young children. The mouth sores are often the first part of the rash to appear and tend to be the most bothersome symptom of the whole illness.
What the Rash Looks Like on Hands and Feet
The rash on the hands and feet appears as flat or slightly raised red spots, sometimes with blisters that have a ring of redness at their base. The spots concentrate on the palms and soles, which is unusual for most childhood rashes and one of the easiest ways to recognize HFMD. On darker skin tones, the spots may appear grayish or white rather than red, so look for the texture (raised bumps or blisters) as much as the color.
The rash is generally not itchy, though some children do experience mild itching. Blisters on the hands and feet are usually small, roughly a few millimeters across, and filled with clear fluid. They tend to dry up within about 10 days.
Other Body Areas That Can Be Affected
The classic rash sticks to the mouth, hands, and feet, but spots also commonly appear on the elbows, knees, buttocks, and genital area. A strain called Coxsackievirus A6 can cause a more widespread, atypical rash that covers the arms, legs, trunk, and the skin around the mouth. This version can look similar to chickenpox, with a more scattered, blister-heavy pattern that sometimes catches parents and even doctors off guard.
In children with eczema, this same strain can cause blisters to cluster in areas where eczema patches already exist, a pattern sometimes called eczema coxsackium. It looks more dramatic than typical HFMD but follows the same timeline and resolves on its own.
How It Differs From Chickenpox
The location of the rash is the biggest clue. HFMD starts in the mouth and moves to the hands and feet. Chickenpox typically starts on the chest, back, and face before spreading outward. Chickenpox blisters also crust over into scabs, while HFMD blisters tend to flatten and dry out without forming thick crusts. Chickenpox is intensely itchy; HFMD usually is not.
How It Looks in Adults
Adults can catch HFMD, and the rash follows the same general pattern: painful mouth sores and blistering spots on the hands and feet. Adults sometimes experience more intense pain from the mouth sores and may develop a more widespread rash, but the visual appearance is similar to what children get. Many adults have a milder version with fewer blisters, or they carry the virus without developing a visible rash at all.
Full Timeline From Start to Finish
The illness typically clears up within seven to 10 days. Here’s how it usually unfolds:
- Days 1 to 2: Low fever, sore throat, reduced appetite.
- Days 3 to 5: Mouth sores appear first, followed by spots on hands, feet, and sometimes other areas. Spots progress from pink bumps to small blisters.
- Days 7 to 10: Blisters dry up and the rash fades. Children under 2 may take slightly longer to fully recover.
People are most contagious during the first week of illness, but the virus can still spread for days or even weeks after symptoms disappear. The fluid inside the blisters contains the virus, so avoid popping them.
Skin Peeling and Nail Changes Afterward
One of the more alarming things about HFMD happens after the illness itself has passed. About one to two months later, some children (and adults) notice their fingernails or toenails loosening and eventually falling off. This is called onychomadesis, and it looks worse than it is. The nails typically regrow completely within about four weeks, and no treatment is needed.
Skin peeling on the hands and feet is also common in the weeks following the rash. The peeling usually affects the same areas where the blisters were and resolves on its own. Neither the nail changes nor the peeling means the infection is still active or contagious.