At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
A syndrome is a set of symptoms or conditions that occur together and suggest the presence of a certain disease or an increased chance of developing the disease. A disease is the actual diagnosed impairment of health or a condition of abnormal functioning.
Sometimes a syndrome is a disease, sometimes not. A disease is an alteration from normal physiology that produces distress, impairment, or disability; that has a predictable etiology, course, and often standard set of treatments. A Syndrome is a set of symptoms that often goes together. Often a syndrome can be due to number of different etiologies (causes). For instance, a viral syndrome (like the flu) can be due a number of different viruses (e.g. corona virus, influenza, etc). So sometimes a syndrome is a disease but with various possible exact causes. Other times, a syndrome is a set of symptoms and findings that do not have a known etiology. For instance, many of the psychiatric disorders are completely "syndromic" in that they are a collection of symptoms and findings that go together in a fairly predictable manner, but we know very little about the causes.