Psoriasis is known as the undead cancer of dermatology, and for good reason. The arthritis caused by psoriasis is not fatal. At most, it can lead to joint deformities and fluid accumulation in the joint cavity, which can cause inconvenience in movement and even a similar loss of function. Although it does not affect life expectancy, it is best to get treatment urgently, either by taking oral non-steroidal anti-inflammatory drugs such as leflunomide, or by taking oral rehmannia multi-glucosides, or in severe cases, biological agents. After arthritis has already appeared, it is necessary to pay attention to keeping the joint cavity area warm, taking proper rest, avoiding overexertion, joint injury and proper functional exercise.