Trauma may be physical or psychological. Physical traumas may include serious bodily injury including the removal of a limb. This may include impact or force applied from a blunt object or penetrating the skin or tissues with an object. Physical therapy can help individuals after trauma which may include care and use of a prosthesis if a limb has been removed, exercises to help strengthen weakened and stretch tight muscles, gait instruction if needed, manual therapy to decrease tone in tight muscles or scar mobilization and education in posture, joint protection strategies and ergonomics.