A sharp rise in hand, foot and mouth disease (HFMD) cases is being reported in various parts of the United States, especially among young children and, unusually, some adults. Public health officials have flagged the increase, prompting renewed awareness of the illness’s transmission and symptoms.

In Virginia, the Fairfax County Health District confirmed at least six outbreaks earlier this year, largely affecting children under the age of five. The illness, commonly associated with young children, is now being seen in adults as well—with symptoms presenting more aggressively than usual, including widespread rashes and even nail loss.

Dr. Marc Siegel, senior medical analyst at Fox News, warned that the current HFMD wave—particularly linked to the Coxsackie A6 virus strain—could result in more severe symptoms than in past outbreaks. “The number of cases are increasing and are spreading to adults with more unusual symptoms,” he said in an interview with Fox News Digital.

Dr. Tina Q. Tan, a pediatric infectious disease expert at Lurie Children’s Hospital in Chicago, emphasized that such outbreaks are common in warmer months. “We are seeing more cases at this time,” she stated, noting that the illness is usually mild and seasonal.

According to the Centers for Disease Control and Prevention (CDC), HFMD spreads easily through direct contact with nasal secretions, saliva, blister fluid, stool, or contaminated objects. Shared items like utensils, toys, and even doorknobs can be sources of infection. It’s especially contagious during the first week of symptoms, though the virus can linger for several weeks after.

Typical symptoms of HFMD include:

Fever

Sore throat

Painful mouth sores

Rash on the hands, feet, and sometimes buttocks

Fatigue and irritability

Although usually not life-threatening, doctors urge parents and caregivers to take precautions—especially in daycare or school settings where the virus spreads rapidly.

Good hygiene remains the best defense, according to health officials. Frequent handwashing, disinfecting high-touch surfaces, and avoiding close contact with infected individuals can help limit transmission.