On my opel corsa a 1998 model the rear wheel bearings need adjustment. how do i go about doing this?

Taper roller bearings can be tightened but need to be done by someone in the know because if you over tighten them they will fall apart rapidly. Best ask a friend who can do it or take it to a local garage.|||wheel bearings do not require anything but grease now and then ( I do it when I change brakes)|||you can not adjust wheel bearings,just grease them unless you mean they are loosely mounted then you can adjust that but do not over tighten just snug