Finish the sides of the bead with stitches identical to the previous ones, making them on each loop flush with the edge of the hoop, then make a second row to close the side, embroidering only every other stitch of the front round.
Pass the thread inside and bring it out on the other end to be finished in the same way.
At the end of the work, when the thread is well knotted on the last stitch, pass it through the bead again and cut off the protruding length.