Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the complications of Shingles ?
    ### Response:
    The most common complication of shingles is pain -- a condition called post-herpetic neuralgia (PHN). People with PHN have severe pain in the areas where they had the shingles rash, even after the rash clears up. In most patients, the pain usually clears up in a few weeks or months, but some people can have pain from PHN for years.
    