Embodiments for providing stress information in an ultrasound system are disclosed. In one embodiment, by way of non-limiting example, an ultrasound system comprises: an ultrasound data acquisition unit configured to transmit/receive ultrasound signals to/from a target object while applying a stress to the target object to thereby output first ultrasound data and to transmit/receive ultrasound signals to/from the target object while releasing the stress applied to the target object to thereby output second ultrasound data and a processing unit configured to form stress information based on the first and second ultrasound data, wherein the stress information includes stress magnitude information, stress application period information and ultrasound probe gradient information.
