Final answer:
The nurse should report the finding of abdominal pain and tenderness to the provider immediately as it may indicate worsening of the infection or the presence of an abscess.
Step-by-step explanation:
The nurse should report the finding of abdominal pain and tenderness to the provider immediately. Acute pelvic inflammatory disease (PID) is a serious infection that can lead to complications if not treated promptly. Abdominal pain and tenderness are common symptoms of PID and may indicate worsening of the infection or the presence of an abscess. The provider needs to be informed immediately so that appropriate treatment can be initiated.