1. What are the signs or symptoms of a nail fungus infection?
2. How are nail fungus infections diagnosed?

What are the signs or symptoms of a toe nail fungus infection?
A: You may see, smell, or feel a toe nail fungus infection once it takes hold.

• Nails may look brownish, yellowish, or have little white patches. Some may even be brown or black.
• Nails may get flaky, brittle, and chipped.
• Bits of "gunk" or debris may collect under your nails.
• Your nails may smell bad.
• Toenails may get so thick that wearing shoes causes pain.
• Discomfort from the infection may make it hard to walk, work, or do other activities.

These symptoms may not get better. In fact, if nail fungus infections are not treated, they may get worse.

Q: How are toe nail fungus infections diagnosed?
A: Most often, the tiny fungus gets under the nail and takes hold. Anything that damages a nail can make it easier for the fungus to move in, such as: