* Chemical Reaction: Bleach (sodium hypochlorite) is a strong oxidizing agent. It can react with the pigments (melanin) in your nails or with organic matter on or under the nail. This reaction can alter the color of the nail.
* Porous Nature of Nails: Fingernails are somewhat porous. This allows the bleach to penetrate and react with the nail matrix (the area under the cuticle where the nail grows from).
* Protein Damage: Nails are primarily made of keratin, a protein. Bleach can damage or denature this protein, which can lead to discoloration and weakening of the nail.
Important Considerations:
* Concentration and Exposure Time: The stronger the bleach and the longer your nails are exposed, the more likely discoloration is to occur.
* Underlying Nail Conditions: If you have any pre-existing nail conditions like fungal infections or injuries, they can make your nails more susceptible to discoloration from bleach.
* Fake Nails: Artificial nails are also susceptible to staining from bleach. Acrylics, gels, and nail polishes can react with bleach, causing discoloration or damage.
To avoid discoloration:
* Wear gloves: Always wear gloves when working with bleach.
* Minimize exposure: If you accidentally get bleach on your nails, wash it off immediately with soap and water.
* Use diluted bleach: If you must use bleach, dilute it according to the manufacturer's instructions.
* Consider alternatives: Look for non-bleach cleaning products.
If your nails have turned brown or yellow due to bleach and the discoloration persists, consult a doctor or dermatologist to rule out any underlying nail conditions.