The Surprising Blue Leg Phenomenon in Long Covid Patients

A 33-year-old man with Long Covid experienced a rare condition called acrocyanosis, where his legs turned blue when he stood up. A study in the Lancet found that this condition is linked to a nervous system disorder affecting heart rate and blood pressure. The man's legs became red and then blue within a minute of standing, with the color becoming darker and veins more visible over time. The symptoms resolved when he sat down.