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The posterior superior iliac spine (PSIS) is located on the back, just above the buttock. It can usually be seen and felt under the indents just above the buttock.
(This answer provided for NATA by the University of Tampa Athletic Training Education Program)
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.