Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Angina ?
    ### Response:
    Pain and discomfort are the main symptoms of angina. Angina often is described as pressure, squeezing, burning, or tightness in the chest. The pain or discomfort usually starts behind the breastbone.
                
Pain from angina also can occur in the arms, shoulders, neck, jaw, throat, or back.
    