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  1. Color blindness - Diagnosis and treatment - Mayo Clinic

    Jan 10, 2025 · Is it red or is it green? Learn more about what causes this common eye condition and how to tell whether you can distinguish between certain shades of color.

  2. Color blindness - Symptoms and causes - Mayo Clinic

    Jan 10, 2025 · Is it red or is it green? Learn more about what causes this common eye condition and how to tell whether you can distinguish between certain shades of color.

  3. Urine color - Symptoms and causes - Mayo Clinic

    Oct 11, 2025 · Overview Regular urine color ranges from clear to pale yellow. But certain things can change the color. Foods such as beets, blackberries and fava beans can turn urine pink or …

  4. Discolored semen: What does it mean? - Mayo Clinic

    Aug 20, 2025 · Red semen. Eating a lot of red-colored foods, such as beets, could cause red semen. Sometimes, red or red-streaked semen could mean blood is present. Possible causes …

  5. Stool color: When to worry - Mayo Clinic

    Oct 10, 2024 · Stool color is generally influenced by what you eat as well as by the amount of bile — a yellow-green fluid that digests fats — in your stool. As bile travels through your digestive …

  6. Red eye Causes - Mayo Clinic

    Feb 19, 2025 · This eye condition often looks much worse than it feels. Find out possible causes of inflamed, irritated eyes and when to call the doctor.

  7. Rosacea - Symptoms and causes - Mayo Clinic

    Oct 17, 2023 · Rosacea (roe-ZAY-she-uh) is a common skin condition that causes flushing or long-term redness on your face. It also may cause enlarged blood vessels and small, pus-filled …

  8. Blood in urine (hematuria) - Symptoms and causes - Mayo Clinic

    Dec 24, 2025 · Red urine isn't always caused by red blood cells. Some medicines can cause urine to turn red, such as a medicine called phenazopyridine that eases urinary tract symptoms. …

  9. Types of birthmarks (birthmark pictures) - Mayo Clinic

    Jan 25, 2024 · Learn to identify types of birthmarks by how the skin looks. Examples include café au lait spot, congenital nevus, port-wine stain and hemangioma.

  10. Urine color - Diagnosis and treatment - Mayo Clinic

    Oct 11, 2025 · Foods and medicines can change the color of urine. But a color change also could be a sign of disease.