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  1. Nipple - Wikipedia

  2. Nipple Facts: 25 Things to Know About Types, Sizes, and Bumps - Healthline

  3. What types of nipples are there? - Medical News Today

  4. Nipple Problems: Causes, Diagnosis and Treatments - Healthline

  5. Parts of the Breast: Areola, Nipple, Milk Ducts & More - Verywell Health

  6. Nipple problems: Symptoms, causes, and treatments - Medical News Today

  7. Eight causes of nipple pain - Medical News Today

  8. Nipple Color and Other Changes: What's Normal? - Verywell Health

  9. Nipple Facts: Types, Shapes, Height, Sensations, and More

  10. Nipple Problems and Discharge | Johns Hopkins Medicine