Answer:
The client is experiencing systemic toxicity as a result of the local anesthesia.
Explanation:
There are several side effects associated with injecting local anesthesia, which varies from person to person. However, symptoms of mild toxicity from local anesthesia include a ringing in the ears, a metallic taste in the mouth, and perioral numbness. Thus the patient is just experiencing systemic toxicity from the local anesthesia.
