He might be needing stitches. Shawn Mendes was spotted with a bloody injury in Beverly Hills, California, on Tuesday, as seen in gruesome photos obtained by Page Six. The singer, 27, held a stained towel over his left hand as he attempted to staunch the bleeding, which was visibly dripping down his arm. Shawn Mendes suffered a hand injury Tuesday. PrimePix / BACKGRID The singer was spotted in Beverly Hills, California, holding a bloodstained towel over his hand. PrimePix / BACKGRID Blood dripped down the Grammy nominee’s arm. PrimePix / BACKGRID The “There’s Nothing Holdin’ Me Back” performer, who was dressed casually in a black tee, jeans and flip flops, appeared calm as he headed to urgent care with girlfriend Bruna Marquezine . The actress also cut a casual figure in a tan sweater set. The songwriter was photographed later that same day, sporting bandages on both his thumb and middle finger. The 27-year-old singer appeared calm despite the wound. PrimePix / BACKGRID He was spotted heading to urgent care.…