A Client Who Has Used Insulin for Diabetes Control for 20

A client who has used insulin for diabetes control for 20 years has a spongy swelling at the site used most frequently for insulin injection.Which is the nurse's best action?

A) Apply ice to this area for 20 minutes.
B) Document the finding in the client's chart.
C) Assess the client for other signs of cellulitis.
D) Instruct the client to use a different site for injection.