knowledge_verse.. on Instagram: "- The post features a 30-second time-lapse video showing a toenail's recovery from subungual hematoma, where trauma-induced blood pooling lifts the damaged nail, revealing healthy regrowth underneath over months. - Human nails regenerate from the matrix at the base; toenails fully regrow in 12-18 months, per Harvard Health data, demonstrating the body's keratin production without intervention if the matrix is undamaged. - With 31,000 likes and 3 million views in