The nail is an appendage of the skin, and nail dystrophy is a common disease in dermatology. The symptoms of nail dystrophy are as follows: 1. The nail cap will not appear crescent, indicating that the body lacks certain micronutrients, resulting in nail dystrophy. 2. The color, appearance and luster of the nail will change, the color may darken, the original luster will be lost, the nail may be deformed and a series of changes. 3. The nail cap will have a wide or narrow pigment streak. The nail cover may also appear pitted grooves, or nail performance bumpy. 4, the nail cover is easy to break, nail dystrophy patients nails will be subject to light touch will break, the thickness of the nail than before to become thinner, easy to be hurt.