Most of my toe nails are yellow and cracked. From everything I ve read online, it seems to be fungus. Way back my doctor prescribed an over-the-counter medication for external use to apply on the nails. It didn t work. Since then, I ve tried several other medications from the drug store that didn t work either. WebMD indicates I may need anti fungal drugs , but these may hurt my liver, which is a little scary. I was hoping there was truly a external application medication out there, but it doesn t seem like it. What treatment have you recommended to your patients that was the most successful? Thank you.