Hi Wendy .....
I am not a doctor, but it seems like he would be running a fever if it is the start of an infection.
It is so difficult to watch a loved one be in pain, especially when it gets worse, not better.
For whatever reason (I do not know), some doctors are very cautious about ordering morphine. It could be preference or other medical issues in particular patients. Following my three brain surgeries (three different doctors), I had morphine for totally different lengths of time and in different ways. That being said, it may be possible they just tried to stop the morphine too soon with your husband.
Another possibility is swelling around the incision, causing the pressure bandage to be very tight.
Hopefully today the doctor will be able to determine the cause and order a better pain protocol for him.
Thoughts and prayers. Clarice