Toenails of people of all ages can undergo a range of changes, some of which are relatively common. They can become thick, brittle, curved, discoloured, infected, clubbed, bumpy and grooved. In some cases, the nail falls off and a new one grows in. As we grow older, we are more likely to develop toenail problems.
Toenail problems may be caused by warts, tumors under the nail, infection, or poor circulation. Major toenail problem culprits are incorrectly fitting shoes, which press too tightly on the toenails. Injury, such as bruising under the nail and infection can cause permanent nail deformity.