.1 While it predominantly affects children, it is important to note that it can also affect adults. Although it is not a life threatening infection, it can cause a painful rash and is highly contagious. The infection is easily spread in multiple ways, including via respiratory droplets, contact with vesicular or nasal secretions, or through fecal-oral transmission. Most cases occur during the summer and fall seasons but individuals can be infected at any time of the year.
HFMD typically starts with a few days of non-specific viral symptoms, such as fever, cough, sore throat, and fatigue. It is then followed by an eruption of intraoral macules and vesicles and a widespread distribution of oval shaped macules that predominantly involve the hands and feet.1 Both children and adults can present atypically. Atypical presentations include vesicles and bullae on extensor surfaces such as the forearms, as well as eruptions on the face or buttocks.2 Other atypical morphologies include eczema herpeticum-like, Gianotti-Crosti-like, and purpuric/petechiae.3 Atypical hand, food, and mouth disease cases are often caused by coxsackievirus A6, however other strains of coxsackievirus can also cause atypical symptoms.2,3
Our 35-year-old female patient presented with eroded papules and vesicles around the mouth. A diagnosis of atypical HFMD was made clinically in the following days when the patient developed the more classic intraoral and acral macules and vesicles.
Vanessa Ortega, Dr. Brooke Resh Sateesh, and Dr. Justin Gordon
Similar to our case, HFMD is most often diagnosed clinically. PCR testing from an active vesicle or nasopharyngeal swab can be obtained. Treatment for HFMD is supportive and symptoms generally resolve over 7-10 days. Over-the-counter analgesics, such as ibuprofen and acetaminophen, as well as oral analgesics that contain lidocaine or diphenhydramine are often helpful3. In this case, our patient improved over the course of seven days without needing therapy.
Dr. Donna Bilu Martin
This case and the photos were submitted by Vanessa Ortega, BS, University of California, San Diego; Brooke Resh Sateesh, MD, and Justin Gordon, MD, San Diego Family Dermatology. The column was edited by Donna Bilu Martin, MD.
Dr. Bilu Martin is a board-certified dermatologist in private practice at Premier Dermatology, MD, in Aventura, Fla. More diagnostic cases are available at mdedge.com/dermatology. To submit a case for possible publication, send an email to dermnews@mdedge.com.
References
1. Centers for Disease Control and Prevention. (2023, June 20). Symptoms of hand, foot, and mouth disease.
2. Drago F et al. J Am Acad Dermatol. 2017 Aug;77(2):e51-6. doi: 10.1016/j.jaad.2017.03.046.
3. Starkey SY et al. Pediatr Dermatol. 2024 Jan-Feb;41(1):23-7. doi: 10.1111/pde.15461.