Psoriatic arthritis is a rheumatic disease that causes inflammation in the joints. This pathology is associated with a chronic condition of the skin called psoriasis and it usually appears after cutaneous lesions do. It rarely manifests simultaneously or precedes the dermatological lesions. In addition, this pathology usually affects the joints of the fingers and toes, which become inflamed and lose functionality. The evolution of the disease can deform and destroy the aforementioned joints. Treatment consists of alleviating symptoms with nonsteroidal anti-inflammatory drugs and modifying and stopping the disease with immunosuppressants. It is also important to rest during the periods of inflammation and do some physical rehabilitation. When psoriatic arthritis affects children, the disease is included in the category of juvenile arthritis, which presents various clinical modalities such as juvenile idiopathic arthritis or rheumatoid arthritis in children, and reactive arthritis in children, among others.