Small pieces of glass stuck in in your feet can often be very hard to remove. This is a recommended way to remove splinters or slivers of glass from the bottoms of your feet.
Take a sterilized needle to carefully remove the skin over the splinter and then remove the glass sliver with a sterilized pair of tweezers. Make sure to sterilize the needle and tweezers by soaking them in rubbing alcohol for 5 to 10 minutes. Clean the area with antibacterial soap and water after removing the splinter. Please see your doctor if there is significant swelling, pus, or if the glass sliver is deeply embedded.