Fungal toenails are caused by a microorganism (dermatophyte) that infects the nail tissue. Common changes to the nail includes: thickness, deformity, loosening of the plate from the nail bed, discoloration, and crumbly debris under the nail. Pain may result from shoe pressure on a thickened deformed toenail.
Certain things can make you more susceptible to infection such as: trauma, age, and poor circulation. Your doctor may clip a piece of the nail to have a pathologist confirm the presence of fungus in the nail. Treatment includes maintenance/debridement, topical products, oral medication, laser treatment, or permanent removal of the nail.
If you have an abnormal toenail(s), it is recommended you see a Podiatrist for evaluation and to discuss treatment options.