Astrology talks about our entire life, our family in our life, our ancestors, our past life, diseases and even how we can die. The 8th house/Scorpio and Pisces/12th house is linked to death in astrology.
Saturn rules the zodiac sign Capricorn. Capricorn rules the knees, joints, skeletal system, and teeth. An afflicted Saturn can cause depression, chronic diseases, stomach pain, blindness, deafness, constipation, skin issues, muscle and joint weakness. Also an 18 degree placed here can mean you get one of these diseases from your career and your illness can even be due to over working.