Autoimmune diseases arise when the immune system mistakenly targets the body’s own cells, resulting in tissue damage and chronic inflammation. Rheumatoid arthritis (RA), multiple sclerosis (MS), type 1 diabetes (T1D), psoriasis, and systemic lupus erythematosus (SLE) are five significant autoimmune disorders that affect various organ systems but have similar immunological dysfunction. Pancreatic β-cells are destroyed by the immune system in T1D, which leads to insulin shortage; MS interferes with neural communication by attacking the central nervous system; RA primarily affects synovial joints, causing pain and deformity; and the skin, kidneys, and cardiovascular system are just a few of the organs that are affected by SLE. Psoriasis is a chronic autoimmune skin condition that affects millions of people worldwide. Red, scaly skin patches that can be painful, itchy, and deformative are the hallmark of this illness. The severity might range from minor, localized lesions to extensive ones. Notwithstanding their variations, these illnesses share traits like immunological tolerance dysregulation, environmental triggers, and genetic predisposition. Although disease management has improved due to advancements in immunomodulatory treatments and diagnostics, early detection and individualized treatment still present hurdles. In order to improve outcomes for people with autoimmune disorders, this work emphasizes the significance of ongoing research on common processes and therapeutic approaches.