Fixed drug eruption/Recurrent herpes simplex.
How to Cite
Fixed drug eruption and recurrent herpes simplex are very different disorders. However, they share only a clinical characteristic, namely they recur many times always in the same site. Fixed drug eruption recurs whenever the patient takes up the specific responsible drug whereas herpes simplex recurs whenever the virus undergoes reactivation. However, these two different events in children take place almost always in the same occasion, namely a febrile infection of the upper respiratory tract. Hence sometimes the necessity of a differential diagnosis between these two apparently so different disorders.