What is causing this patient's periumbilical pain and erythema?

What is causing this patient's periumbilical pain and erythema? JAAPA. 2017 Mar;30(3):49-51 Authors: Henriques V, Greene T, Sharma R PMID: 28221322 [PubMed - in process]

https://www.ncbi.nlm.nih.gov/pubmed/28221322?dopt=Abstract

Source: Pain Physician - February 23, 2017 Category: Anesthesiology Authors: Henriques V, Greene T, Sharma R Tags: JAAPA Source Type: research

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