Once fungus arrives it can be a slow and often invasive process to clear up the infection. The best nail fungus treatments can speed up the healing process and help remove the fungal infection. Since fungus usually shows up as a slight discoloration of the nails, it can fool anyone into believing the altered state of their nails is due to an inferior bottom coat of nail polish. According to sources at the Mayo Clinic, the real telling sign is that as the infection manifests, the nail thickens and crumbles, spreading to your other nails. Although there are plenty of medical treatments available to stave off the infection, some can take up to a year to work and others are way more invasive than you may be comfortable with. Not to mention, popular oral treatments can be expensive and carry side effects as severe as toxic liver damage.