Fungal infections of the toenails are common, but not all spots or irregularities of the toenails are caused by fungus. Bruises, warts, psoriasis, and even skin cancer can affect the color and appearance of toenails.
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Why You Shouldn't Use Bleach for Toenail Fungus
How to Get Rid of Foot and Toenail Fungus
Is this toe nail fungus or something else? : r/NailFungus