The difference between gray nails and psoriasis nails lies in the different causes, clinical manifestations, and auxiliary examination results.
1. Pathogenesis: gray nails are lesions caused by fungal infection of the nails and are infectious. Psoriasis nails are caused by psoriasis involving the nails and are not infectious.
2. Clinical manifestations: gray nails manifested as turbid nails, thickening, separation, discoloration, uneven surface, etc., patients often have a history of tinea pedis. Psoriasis nail manifests as nail concavity, unevenness, turbidity, hypertrophy, white nail, nail destruction, hyperkeratosis under the nail, etc. Most of the patients also have erythema and scaling of the skin all over the body.
3. Auxiliary examination results: the results of fungal microscopy and culture of gray nails are positive, and the results of fungal examination of psoriasis nails are negative.
If the nails appear lesions, it is recommended to go to the hospital as soon as possible for an interview, and systematic treatment after confirmation of the diagnosis by a professional physician.