To see tacks in your dream symbolizes annoyances in your life that are causing you to be confrontational and quarrelsome.
Dreams of a tack signify awareness of your sharp edges. This dream could also be a message to consider being more tactful so that your criticism doesn’t injure someone. Consider the use of the tack. Also this can be wordplay for your judgements about something in your life being tacky, or of having tacky behavior.
A dream of quarrels and enmity (Gypsy).