What Causes Lymphatic Fluid Leak Despite Sutured Scrotum Post Urinary Sphincter Removal

My father had a urinary sphincter device removed. He had an opening in the scrotum where some of the tubing had poked through. Opening in scrotum was sutured after removal of the tubing. He is now leaking what may be lymphatic fluid, mostly at night, but he soaks the entire bed. No color, no odor, no pain, not blood or pus. Leaks some during the day causing briefs and pants to have to be changed. Has had lymphedema in the left leg for at least 20 years because of prostate cancer resulting in radiation treatments and eventually resulting in removal of the prostate ans testicles.