Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sprains and Strains ?
    ### Response:
    A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint.
    