In recent years, the media and internet have been the stage of a campaign of scientific disinformation led by patient advocacy groups, supported by some « experts » in the field, demanding recognition of health problems attributed to Lyme disease. The controversy has led several professional societies and leading scientific journals in Europe and the United States to reaffirm their position and update their recommendations. Tick bites are common in our area, and medical practitioners must know their potential complications, respond to questions from worried patients, and confront their own doubts and uncertainties. This article aims to give an update on current knowledge of tick-borne diseases based on a number of common assumptions.