What does it mean if immunoglobulin IgG is high?

Generally, elevated levels of immunoglobulin IgG indicate that the lymphocytes producing IgG are abnormally active, which is usually associated with various disease conditions. A detailed analysis is as follows:

Immunoglobulin IgG is an important type of antibody in the human body, capable of neutralizing viruses, fighting bacteria, and modulating immune responses. When IgG levels rise, it may indicate the presence of infectious diseases such as pneumonia or bronchitis, which can trigger immune responses leading to increased IgG levels. Additionally, autoimmune diseases such as rheumatoid arthritis and systemic lupus erythematosus, as well as hematologic disorders such as lymphoma and IgG-type myeloma, may also cause elevated IgG levels. Other conditions such as cirrhosis, subacute bacterial endocarditis, and chronic active hepatitis can similarly lead to changes in IgG levels.

In daily life, maintaining a healthy lifestyle—including regular sleep patterns, balanced nutrition, and moderate exercise—can help strengthen the immune system and reduce the risk of infections. Furthermore, regular medical check-ups can assist in the timely detection and management of hidden infections, autoimmune diseases, or blood disorders, thus preventing abnormal elevations in immunoglobulin IgG levels caused by these conditions.