Psoriasis may recur when blood sugar is not controlled in type 2 diabetes, but the correlation is still under study. Psoriasis is a chronic scaly skin disease caused by the interaction of multiple factors, the course of the disease is prolonged, easy to recur, and its etiology includes genetic, immune, and environmental factors, environmental factors include infections, obesity, smoking, alcoholism, stress, pregnancy, and the effects of certain drugs. Although psoriasis and diabetes are two separate diseases, they are often comorbid with each other. systemic inflammatory state of visceral fat is an important cause of obesity-induced insulin resistance and type 2 diabetes mellitus, and the development of psoriasis is also closely related to inflammation, and the association between the two is still under research. good glycemic control of type 2 diabetic patients can help psoriasis to benefit from the condition. People with type 2 diabetes combined with psoriasis should keep their blood sugar under control and seek medical attention for any discomfort.