Toenail fungus is a "constitutional" health problem, for which you would need to consult with a classical homeopath. We sit with new clients for 1-2 hours to go through current symptoms (for example, perhaps you also have headaches, or backaches, or menstrual cramps), past health history, family health history, life situation, and general symptoms – like response to weather, sleep patterns, food preferences, etc. From that we research to find a remedy that will restore deep inner harmony to your organism, facilitating healing from the inside-out (where it begins, contrary to appearances).

http://www.homeopathicdirectory.com is the national directory for any homeopath certified in N. America. Around the world, you'd have to be sure a homeopath has similar qualifications. Because it's so readily available, people misunderstand what homeopathy is. Even practitioners who claim to offer homeopathy often have a consumer-level awareness. Look for someone certified whose practice is 100% classical homeopathy – no acupuncture, kinesiology (muscle testing), etc.

It might spontaneously resolve if you're otherwise in good health. If not, though, and other toenails become involved, think about calling a homeopath.