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  1. 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 tract, it is chemically altered by enzymes, changing the colors from green to brown.

  2. Melanoma pictures to help identify skin cancer - Mayo Clinic

    Dec 16, 2023 · Melanoma pictures for self-examination Melanoma is a serious form of skin cancer. It often can be cured if found early. These melanoma pictures can help show you what to look for. The American Academy of Dermatology advises watching skin spots for: Asymmetry. Border irregularity. Color changes. Diameter greater than 1/4 inch (about 6 ...

  3. White stool: Should I be concerned? - Mayo Clinic

    Jul 3, 2025 · Stool gets its typical brownish color from bile, which flows into the small intestine during the digestive process. If the liver doesn't produce bile or if bile gets stuck in the liver, stool will be light colored or white. Often the problem occurs in the tube that delivers the bile to the small intestine. This tube is the bile duct.

  4. 7 fingernail problems not to ignore - Mayo Clinic

    Jun 30, 2023 · Yellow nail syndrome In yellow nail syndrome, nails thicken and grow slower. This results in the nails turning a yellowish color. Nails affected by yellow nail syndrome might lack a cuticle and detach from the nail bed in places. Yellow nail syndrome may be a symptom of a lung disease, such as chronic bronchitis.

  5. Patent foramen ovale - Diagnosis & treatment - Mayo Clinic

    Oct 25, 2022 · Variations of this procedure may be used to identify a patent foramen ovale, including: Color-Doppler. When sound waves bounce off blood cells moving through the heart, they change pitch. These changes are called Doppler signals. They appear in different colors on the echocardiogram. This test can show the speed and direction of blood flow in ...

  6. 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.

  7. Moles - Symptoms and causes - Mayo Clinic

    Dec 15, 2023 · Moles, also known as nevi, are a common type of skin growth that vary in color, shape and size. While most moles are most often harmless, they rarely can become cancerous.

  8. Color blindness - Diagnosis and treatment - Mayo Clinic

    Jan 10, 2025 · Diagnosis If you have trouble seeing certain colors, an eye care professional can test for a color deficiency. Testing likely involves a thorough eye exam and looking at specially designed pictures. These pictures are made of colored dots that have numbers or shapes in a different color hidden in them.

  9. Urine color - Symptoms and causes - Mayo Clinic

    Jan 10, 2023 · An unusual urine color also can be a sign of a health problem. For instance, some urinary tract infections can turn urine milky white. Kidney stones, some cancers and other diseases sometimes make urine look red due to blood.

  10. Raynaud's disease - Symptoms and causes - Mayo Clinic

    Nov 16, 2024 · Raynaud's disease causes smaller blood vessels that supply blood flow to the skin to narrow in response to cold or stress. The affected body parts, usually fingers and toes, might turn white then blue. Depending on your skin color, these color changes may be harder or easier to see. The affected areas may feel cold and numb …