Well, there a lot of ways to cure toenail fungus but unfortunately, what works for one person may not work for another.
The most common ways people try to treat their infection is through prescription oral medicine. I've read reports of good success rates but there's also a serious risk of kidney damage from these pharmaceuticals.
If you're worried about his you can try a topical antifungal cure. Some like, apple cider vinegar, epsom salt water, and tea tree oil are natural and considered a home remedy. Others like Loceryl are prescription only.
Finally, there's a new thing on the horizon. It's a laser treatment pioneered by Pinpointe Laser company. The procedure basically involves using a laser to kill all the fungus near, on, and underneath the nail bed. Initial success rates have been good but this surgery has not been approved by the FDA. HOWEVER, since the Pinpointe and Noveon laser systems have been approved by the FDA for other laser treatments AND since the FDA does not regulate the medicinal practices, the laser can be used by licensed doctors for toenail fungus removal since the laser device itself has met approval.
I hope that last part isn't too confusing. You can read my toenail fungus treatment hubs if you want to know more.