Please choose the correct ending to complete the given sentence: Health: [header] How to cure nail fungus [title] Look for a white or yellow spot under your nail. [step] This is the first sign of a fungal infection. It may appear under the tip of your nail.

Ending1: As the infection takes hold, the discoloration will spread and your nail will become thicker and crumbly on the sides. [substeps] Your nail may also be distorted in shape. Ending2: It might also be on your bottom nails. [substeps] Keep in mind that fungus can develop from overexposure to chemicals, such as ammonia and detergents. Ending3: It can then spread up into the surrounding tissue. The fungus will spread to your nails as well! [title] Check for an ivy stain on your nail. Ending4: [title] Feel for tiny bumps on your nails. [step] These bumps can be the result of fungus or other bacteria.

Answer format: ending1/ending2/ending3/ending4