Deformed nails may arise from different causes. Common diseases nail onychomycosis, a fungal disease that mainly affects the toenails, but does not avoid the nails on his hands. In onychomycosis nail gradually turn yellow and become crimp. Onychomycosis, however, is not just a cosmetic problem, toenail can be quite painful and complicate patient walking. Dermatologist the disease prescribe appropriate treatment that takes too long and it is also necessary to keep other measures, such as disinfection of shoes, wear suitable and breathable shoes and socks, etc.

The nails may also be affected by psoriasis, which can manifest like onychomycosis. Psoriatic typically nail pitting, if pierced pin and are discolored to yellow to brown.

The nails also may show systemic diseases or lack of any vitamin or trace element. For long-term iron deficiency describes lžičkovité nails – nails are like dented (have raised edges), and tend to fray and break. Similar nails can arise even in thyrotoxicosis (an overactive thyroid), lichen planus, or congenital.