Most likely, you will have to remove the drain flange from the drain. It will have cross hairs, where you can unscrew it using a tool called a spud wrench. If you do not have this tool you could try using the handles of a channel locks. If you remove the drain flange, remove the old systems putty then continue to remove the clog. When you are ready

When you begin experiencing symptoms in your ears, including that annoying clogged feeling that can make it difficult to hear, it's often because your Eustachian tube is blocked with mucus. These middle-ear disturbances can cause symptoms of dizziness in those suffering from allergies, colds, and sinus infections.