Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Polymyalgia Rheumatica ?
    ### Response:
    Polymyalgia rheumatica is a disorder that causes muscle pain and stiffness in your neck, shoulders, and hips. It is most common in women and almost always occurs in people over 50. The main symptom is stiffness after resting. Other symptoms include fever, weakness and weight loss.
    