What would be the causes of a thickening scrotum wall? My husband left scrotum has a hard mass in it. He is 48-years old, very healthy, but also has Type 1 diabetes (diagnosed two years ago). His sugar has been very high overall for the past two weeks compared to usual (200 to even 500) and some super lows (36-40), which I don't think is a coincidence. No soreness, no redness, and no fever though.