it is: A crushed spot in the wood.
- High heels
- Dropped heavy objects
- Metal tips on furniture legs
If wood fibers are not broken, attempt to draw fibers back up with an
electric iron over a dampened cloth. If fibers are broken, remove and
repair the damaged boards. The entire floor may need to be resanded and
refinished. Institute good floor maintenance procedures, such as removing
high heels and using floor protectors.