Well, I believe men, by our nature and our culture, see ourselves as the strong ones, the problem-solving ones. We don't envision ourselves getting sick and needing help. We see pain and illness as a sign of weakness. So, many times we are in denial, and play the "ignore it and it will go away" game.
What can you do? That's a good question. Be assertive but don't nag! I know that is a tall order. Many times we men do need help in recognizing there is a problem and then getting the necessary help. It ain't easy to do this, but well worth the effort.
Sometimes you can get another male to talk with your male and get help that way. Sometimes not. It's worth a try.
Don