When blisters show up on your child’s hands, feet, and inside the mouth along with a sudden fever, it’s natural to wonder how many days that fever should last and when it’s actually safe to send them back to daycare. This information reflects U.S. (CDC) guidance; if you live elsewhere, check with a local pediatrician for country-specific recommendations.
Why It Happens
Hand, foot, and mouth disease (HFMD) is caused by a group of enteroviruses, most often coxsackievirus A16, and it takes 3 to 6 days after exposure for the first symptoms to appear, according to the CDC. The virus spreads through saliva, mucus, blister fluid, and stool, so it moves easily in group childcare settings where toys, hands, and surfaces are shared constantly. Once the virus reaches the mouth and skin, it triggers small blisters on the palms, soles, and inside the mouth, often alongside a fever as the body’s immune response ramps up.
How It Looks at Different Ages and Stages
HFMD is most common in children under 5, especially once they start group daycare or preschool, per HealthyChildren.org. In most cases, fever stays in a mild-to-moderate range and clears within a few days, while mouth sores can make eating and drinking uncomfortable for close to a week. Symptoms are usually mild and resolve on their own within 7 to 10 days. Rarely, infection with a strain called enterovirus 71 can progress to more serious complications affecting the brain or lungs, which is why any unusual neurological symptom deserves fast attention regardless of the child’s age.
Caring for It at Home
Offering small, frequent sips of cold water, milk, or a diluted electrolyte drink helps prevent dehydration when mouth pain makes eating hard; cold foods like yogurt or a popsicle are often easier to tolerate than anything acidic or spicy. Acetaminophen or ibuprofen, dosed for your child’s weight, can ease both fever and mouth discomfort. Blisters on the hands and feet are best left alone rather than popped, and the CDC recommends frequent handwashing and disinfecting shared toys and surfaces to limit spread within the household.
Common Parent Mistakes
It’s easy to assume a child needs to wait until every blister is gone before returning to daycare, but per the CDC, children can go back once they’re fever-free and feel well enough to take part in normal activities — the rash itself often lingers longer than the contagious period that matters most. Because policies vary by facility, it’s worth checking your specific daycare’s rules before sending your child back. Reaching for antibiotics in hopes of a faster recovery doesn’t help either, since HFMD is caused by a virus, not bacteria, and treatment focuses on comfort while the illness runs its course.
Signs That Call for Care Right Away
See a doctor if fever lasts more than 3 days or repeatedly climbs above 102°F (39°C). Beyond that, don’t wait to seek emergency care if your child has repeated vomiting, a severe headache, a stiff neck, unusual sleepiness or difficulty waking, sudden muscle jerks or limb weakness, or trouble walking or standing — these can be early signs of the rare neurological complications linked to certain enterovirus strains. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.