Hole under my toenail. please help?

This is s possibility if you have been walking barefoot on carpet there is a possibility you have been bitten by a small insect called an vermoulislied crawler it's a small insect that lives in your carpet or fabric it happened to my brother so if this is so consult a doctor immediately because vermoulilislied crawlers produce a poisonus venom which induces cardiac arrest 24 hours after it being induced by a human