Black urine after medicinal foot baths

A 61-year-old man, without previous disease was admitted to our emergency department (ED) due to syncope at home after soaking his feet in a solution containing 50% of saponated cresol. On physical examination, the patient was lethargic with a strong medicinal smell and brownish discolouration with bullae formation of his bilateral feet (figure 1A), and with otherwise normal vital signs. According to the family, …