Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Pericarditis ?
    ### Response:
    The most common sign of acute pericarditis is sharp, stabbing chest pain. The pain usually comes on quickly. It often is felt in the middle or left side of the chest or over the front of the chest. You also may feel pain in one or both shoulders, the neck, back, and abdomen.
    