Ingrown and Fungal Toenails
Ingrown toenails are curved nails that grow into the sides of the skin. They dig into the soft flesh around nail borders and can cause pain, swelling, and redness. If an ingrown toenail punctures the skin, you run the risk of a bacterial infection.
Similar to athlete's foot, nail fungus develops over time. Fungus gets under toenails and spreads in the warm, moist environment. Toenails can become brittle, thickened, or possibly smelly due to the infection.