To dream about putting on or buying ear plugs means you need to pay closer attention to what people tell you.
If you dream that someone else gives you ear plugs, or makes/asks you to wear them, this suggests you are feeling left out of things socially.
If you dream of wanting to give someone else ear plugs, or making someone wear them, you may be trying to hide something. Perhaps you are concerned about people learning the truth about you, or a certain situation.
