Persistent fungal signs can show up slowly but last for years. Getting rid of toenail fungus can take some patience and requires time to fully heal. It can take several months until treatment is successful, but doing things the right way and getting rid of the underlying cause of nail fungus is the only thing that will keep the infection from coming back again.
If you have diabetes, you may have reduced blood circulation and nerve supply in your feet. You're also at greater risk of a bacterial skin infection (cellulitis). So any relatively minor injury to your feet — including a nail fungal infection — can lead to a more serious complication. See your doctor if you have diabetes and think you're developing nail fungus.