A recent BMJ Case Report outlined the story of a 59-year-old woman who went to A&E after experiencing pain when urinating and abdominal pain. Her symptoms were consistent with urinary tract infection (UTI, commonly referred to by some as cystitis) for which she was prescribed antibiotics and painkillers. During her visit to the hospital, she vomited, became shaky, muddled and had difficulty talking. It transpired that she had consumed several litres of water throughout the day based on medical advice to drink lots of fluids that she recalled from previous experience of UTIs. Unwittingly, the patient brought about a dangerous condition known as acute hyponatremia which can progress to seizures, coma and even death, which is related to drinking too much fluid.