Gray nails, that is, nail fungal disease, its course is slow, usually no self-conscious symptoms, but also can be manifested as nail plate turbidity, broken, affecting fine movements, pain, etc.. 1. Turbid nail plate, broken: according to different types of nail plate performance is different. (1) White superficial type: the nail plate is slightly uneven or loses its luster, and there is white turbidity in the superficial layer. (2) Distal lateral subnail type: the lateral edge of the nail, the distal anterior edge is grayish-yellow turbidity, thickening, surface breakage or unevenness. (3) Proximal subnail: the nail root and half-moon are uneven, rough and thickened, or broken. (4) Total nail disfigurement: the nail plate is completely destroyed, partially or completely detached, the nail bed is thickened and desiccated, and the surface is left with rough keratinized buildup. 2. Impact on fine movements: thickening or destruction of the nail plate may affect the fine movements of the fingers. 3. Pain: Nail thickening and destruction will lead to pain, but also secondary inguinitis, redness, swelling, heat and pain and other symptoms, and even nail loss. Patients with the above symptoms should go to the hospital in a timely manner, under the guidance of the doctor to standardize the treatment.