Scientists have discovered that the gel-like sugar coating on the surface of immune cells plays a key role in the development of psoriasis. Immune cells remove this outer sugar coating, allowing them to leave the bloodstream and penetrate the inflamed skin. This finding challenges the previous understanding of the process, which focused only on changes in the walls of blood vessels. The researchers found that the changes also concern the immune cells themselves and their surface structures. Discovering this mechanism could lead to the development of new therapies that would target the harmful inflammation associated with psoriasis. These new approaches could offer more effective and safer treatment options for patients with this chronic skin disease.