During the administration of chemotherapy through a peripheral intravenous (PIV) line, a patient suddenly complains of severe burning pain at the infusion site. What is the nurse's most appropriate action?

Apply a warm compress to the site to alleviate pain

Reassure the patient that the sensation is normal and continue monitoring.

Stop the infusion and assess the site for signs of infiltration or extravasation.

Increase the infusion rate to minimize discomfort.