Things You'll Need
Instructions
Push the snag through the sweater so that it's directed inward. If you can't get the wool through, use a knitting needle to push. Turn the sweater inside out.
Tie the snag into a knot. Make the knot thick enough so that it won't find its way back to the outer part of the sweater.
Hold the knot so that it's directed away from the rest of the sweater by pinching it and pushing back the surrounding wool. Dab the knot with nail varnish or superglue to prevent it from unwinding. Be careful not to get the varnish or glue onto other parts of the sweater.