In medical astrology, each zodiac sign governs specific body parts: Aries rules the head, Taurus the throat, Gemini the lungs and arms, Cancer the chest and stomach, Leo the heart, Virgo the intestines, Libra the kidneys, Scorpio the reproductive organs, Sagittarius the hips and thighs, Capricorn the bones and knees, Aquarius the ankles, and Pisces the feet.
Astrologers traditionally believed people were more prone to health issues in the body part ruled by their sun sign, though they might also have natural strength there.
This system was used for thousands of years to determine the best timing for medical treatments.