When the nails peel off from the proximal nail folds, the clinical term is onychomadesis and it is important to ask about recent infections or severe metabolic stressors. In children and adults, onychomadesis on multiple fingers may occur after infections and has been associated with hand-foot-mouth disease caused by common viral infections—especially strains of coxsackievirus.1
Because shed nails show evidence of viral infection, one hypothesis for their peeling off is that the tissue of the nail matrix is infected, leading to metabolic changes. As the nail matrix returns to normal function, a new nail is made and ultimately will replace the nail that has come off. In healthy US adults, fingernails grow 3.47 mm per month on average while toenails grow 1.62 mm per month on average.2
Sometimes it’s hard to elicit a history of a very mild viral illness weeks or months after it has resolved. Asking specifically about mouth ulcers may help. If there is a history of a viral illness, no specific work-up or treatment is necessary. Patients may be reassured that nails will improve over several months without lasting effects.
In this case, the patient and her family were given reassurance and the nails returned to normal within a few months.
Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.