Fungal infection on toenailsFungal nail infection can develop in people at any age, but it’s more common in older adults.That is because the wear and tear of the nails as we age can render them brittle and dry – in short, more prone to develop cracks.These cracks in the nails allow fungi to enter. Other factors — such as reduced blood circulation to the feet and a weakened immune system — also add to the vulnerability.We know that the health of our hands and feet reflects our inner health as well.