As a domain expert in cosmetic chemistry, I can provide you with an informed perspective on the relationship between nail polish and nail discoloration.

Nail polish, when used correctly and removed properly, should not cause permanent nail discoloration. However, there are several factors that can contribute to changes in the appearance of your nails:


1. Trauma: Repeated application and removal of nail polish can cause minor trauma to the nail plate, which may lead to a temporary white spot or streak.

2. Allergic Reaction: Some individuals may have an allergic reaction to certain components in nail polish, which can result in discoloration.

3. Nail Polish Quality: Low-quality nail polishes can contain harmful ingredients that may cause discoloration over time.

4. Base Coat: Not using a base coat can allow the nail polish to come into direct contact with the nail, potentially causing staining.

5. UV Exposure: Nail polish can become discolored or fade due to UV exposure from sunlight or tanning beds.

To prevent discoloration, it's important to:

- Use a high-quality nail polish and remover.
- Apply a base coat to protect the nail.
- Avoid using nail polish for extended periods without giving your nails a break.
- Keep your nails moisturized and healthy.

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Dark nail polish and discolored nails dilemma. ... As you have noticed, however, some nail polishes can cause nails to turn an undesirable yellow. The short answer is that in the case of nail polish and nail plate staining, the color painted on your nail can actually penetrate the layers of the keratin of the nail itself.read more >>