@facthusiast on Instagram: "The post features a time-lapse video of a severely bruised fingernail detaching and fully regrowing over months, illustrating the body's natural regeneration process after trauma like a subungual hematoma. Fingernails regenerate from the nail matrix at about 3-4 mm per month, with full recovery typically taking 4-6 months, as supported by dermatological studies in the Journal of Investigative Dermatology. Replies highlight practical tips like relieving pressure by pun