Mollaret's meningitis is a rare, benign, and recurrent aseptic meningitis that presents with headache and abnormal cerebrospinal fluid findings. Symptoms usually improve spontaneously within a few days without permanent sequelae, and the prognosis is favorable. The article describes the case of a 43-year-old patient in whom symptoms rapidly improved, but abnormal cerebrospinal fluid pressure and increased cell count persisted for more than one month after resolution of clinical manifestations. This finding suggests a possible long-term inflammatory reaction associated with the disease. Mollaret's meningitis is characterized by repeated episodes that can last several days, with symptomatic pauses between them. The diagnosis is based on clinical manifestations and cerebrospinal fluid examination. The main cause is often the herpes simplex virus, although a rash does not always appear.