― Shanyna Isom, 28, suffered an allergic reaction three years ago. This Woman Growing Fingernails Out of Every Hair Follicle On Her Body. Mystery Illness Causes Shanyna Isom to Grow Fingernails, Instead of Hair. A 28-year-old woman is reportedly suffering from an extremely rare skin condition. A rare skin condition is causing one 28-year-old woman hair to grow human nails instead of hair.a mysterious illness that has triggered a young woman to grow human nails from her hair follicles. Shanyna [...].