Moreno-Arrones OM, et al. - Researchers sought to identify possible environmental and hormonal factors related to frontal fibrosing alopecia (FFA) in this multicentre case–control study paired by sex and age. Study subjects [664 women (335 cases and 329 controls) and 106 men (20 cases and 86 controls)] completed an exhaustive questionnaire enquiring about pharmacological, environmental, hormonal, social, job exposure, lifestyle, drugs and diet factors to which they were exposed at least 5 years prior to the onset of the disease. Findings suggest a correlation of FFA with hormonal exposure (pregnancy, HRT and raloxifene), comorbidities (hypothyroidism, LPP and rosacea) and environmental factors (facial sunscreens, antiageing creams and occupational exposure).