The answer to 'hardwood floor discolored' is that there are several common causes, including water damage, excessive sunlight exposure, improper cleaning, and natural aging. Discoloration can present as fading, yellowing, or darkening of the wood. The solution depends on the underlying cause, but may involve cleaning, refinishing, or replacement of the affected boards.
It's important to identify and address the root cause to prevent further damage. For minor issues, homeowners may be able to DIY with the right cleaning products and techniques. However, for more extensive discoloration or damage, it's best to call in a professional hardwood floor cleaning and restoration expert.