This tool does not have positive connotations. It may reflect the unrest and difficulty that you are experiencing. If you are self-mutilating, consider your actions and/or addictions. If you dream that you are carrying an open knife, switchblade or penknife, this is an omen that you will soon be having some legal troubles; but a closed one denotes financial losses. A sharp knife means you will have personal troubles, and a rusty one foretells family problems. A dull knife will show that you will have to work hard for little or no gain.