my PSA took a similar jump about 6 months ago from around 1 to 8.4. My urologist immediately suspected prostatitis. I was told my prostate cancer (Gleason 6) would not rise that fast in less than one year. I was put on antibiotics and was retested in about 2 months. My PSA came back down to normal. I really did not have any symptoms when I had this prostatitis so the PSA test was how it was discovered. I will say a prayer something similar is the cause for your husband's rise.