Hi Lynn,
What you described sounds similar to what my wife experienced after they put her port in. Her pain was quite strong in the first two days after operation. The pain got better after a couple of days. Still, she had some pain for about a week.
It’s been more than a year, so my memory is a bit foggy about the medications. I think she took Prescription Tylenol initially. Once her pain got better, she switched to extra-strength non-prescription Tylenol.
All that said…. I think you have to see a doctor if his condition doesn’t improve soon.
Best wishes,
Eli