what is a natural treatment for nail infection that have cause complete nail loss, even bleeding?

Vinegar, tea tree oil, grapeseed extract, and Vics VapoRub®.

With any home remedy or non-prescription topical, you must understand that the effectiveness of the treatment is fairly low, less than 10%.

If you do try one of these therapies make sure to use it every day.
Roughen up the nail surface with a file and apply the medication with a q-tip.