Nail psoriasis, also known as nail psoriasis, manifests itself as nail color changes, appearance changes, scale buildup, thickening and separation of nails. 1. Nail color change: the nails may turn green, brown or yellow, and white spots may appear on the underside of the nails. 2. Changes in nail appearance: Nails may have ridges, grooves, or “thimble-like” indentations. 3. Scaly buildup: A white buildup under the nail that separates the nail from the skin and is painful. 4. Thickening of the nails: About 30% of people with nail psoriasis have a fungal infection that causes the nails to thicken and become brittle and cracked. 5. Separation: The nails may loosen or detach from the nail bed and there is pain. Nail psoriasis in addition to nail changes, the trunk, limbs, scalp may also have red spots, white scales and other manifestations If you suspect that your nails are caused by psoriasis, it is recommended to consult a doctor in time for diagnosis and treatment under the guidance of a doctor.