causalgia
noun
                                                                                                                            
                                                            cau·sal·gia
                    
                                                                                                              
                                                                                                                                  kȯ-ˈzal-j(ē-)ə 
                                                                                                                              
            -ˈsal-
                                                      
                                                          
                                
              
          
                                                      : a constant, usually burning pain that results from injury to a peripheral nerve and is often considered a type of complex regional pain syndrome                                      
                
                    
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  Merriam-Webster unabridged




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