When diagnosed with nail psoriasis, the treatment measures are as follows: 1. First of all, we should pay attention to avoid bringing trauma to the nails and avoid bad habits such as biting nails, trimming nails too frequently and repairing nails too short. Since nails grow slowly, it usually takes 4-6 months of treatment to see the effect, or even a year later to reap better results, so patients should maintain patience, standardize medication and protect their nails; 2, nail psoriasis is usually treated locally, divided into two methods: topical medication and local injection. Commonly used topical drugs include strong and super strong glucocorticoids, vitamin D3 derivatives, retinoids, calcium phosphatase inhibitors, etc. Injections into the skin lesions can also be used, and small doses of tretinoin are commonly used; 3.