[Shiny nail, spotted nail. Beau-Reil lines. When dermatoses entrench in the nails].

Numerous skin diseases, for example psoriasis, eczema, lichen planus, Reiter's syndrome or alopecia areata, may also involve parts of the nail. Depending on the structure involved and the nature and duration of the lesion, a certain disturbance pattern presents. Matrix disorders, which are often observed, may manifest as such characteristic lesions as spots, tracheonychia or Beau's lines. Treatment is determined by the respective underlying disease.