And 8 Other Questions, Answered. Other symptoms you should watch for include:. However, there are some underlying health issues that can also lead to nipple hardness. If your nipples get hard at random, it can be totally normal. What causes pale nipples and are there any treatments? Heart-shaped nipples are a newly popular trend in body modification. Your nipples can become more or less sensitive after you have them pierced.
Clementine. Age: 28.
Here's what may be causing them and what you can do to ease your symptoms.
Lillianna. Age: 23.
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It can happen from time to time, completely out of the blue. Bacteria that enters your breast can lead to mastitis , an infection of the breast tissue that causes nipple hardness. Nipple hardness is just one sign of an allergy or sensitivity.