“The causes of thickened toenails in the elderly are as follows.
As older people age, the metabolism of the cuticle in the toenail section slows down, which tends to produce a build-up of metabolic products, causing thickening of the toenail.
In addition, as we age, the calcium in the toenail decreases and the iron increases, causing an imbalance in the nutrition of the toenail, which can manifest itself in thickened, hardened or twisted toenail lesions.
These thickened toenails in older people do not require special treatment.”