Injury is damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical. Injury may also refer to injured feelings or reputation rather than injuries to the body. A severe and perhaps life-threatening injury is called a physical trauma. Injury to hospitals via an ambulance. The abrasion pictured is not severe.]] · Bruise is a hemorrhage under the skin caused by contusion. · Wound: cuts and grazes are injuries to or through the skin, that cause bleeding (i.e., a laceration). · Burns are injuries caused by excess heat, chemical exposure, or sometimes cold (frostbite). · Fracture are injuries to bones. · Joint dislocation is a displacement of a bone from its normal joint, such as a dislocated shoulder or finger. · Concussion is mild traumatic brain injury caused by a blow, without any penetration into the skull or brain.