Tea Tree worked for my dh. I've copied this :
Results from scientific studies supporting the use of tea tree oil to treat nail fungus are mixed. Some of the research points to tea tree oil’s potential as an antifungal, but more studies are needed.
According to a 2013 study, tea tree oil was effective in reducing growth of the fungus Trichophyton rubrum in nail infections. T. rubrum is a fungus that can cause infections such as athlete’s foot and nail fungus. Improvements were seen after 14 days.
This study used an in vitro model, which is sometimes called a test-tube experiment. In in vitro studies, the experiment is done in a test tube instead of on an animal or human. Larger human studies are needed to expand on these findings.
Combining tea tree oil with standard medicated creams is also an option. A small 1999 studyTrusted Source found that participants were able to successfully manage toenail fungus by using a cream that contained butenafine hydrochloride and tea tree oil.
After 16 weeks of treatment, 80 percent of participants who used this cream cured their toenail fungus with no relapses. No one in the placebo group cured their nail fungus. Further studies are needed to determine which of these ingredients is most useful in treating nail fungus.
Results of a 1994 studyTrusted Source found pure tea tree oil was equally as effective as the antifungal clotrimazole (Desenex) in treating fungal toenail infections. Clotrimazole is available both over the counter (OTC) and by prescription.