This study aimed to explore the relationship between serum levels of interleukin-17 (IL-17), interleukin-18 (IL-18), interleukin-22 (IL-22), interleukin-25 (IL-25), anti-BP180 antibodies, anti-BP230 antibodies, and immunoglobulin E (IgE) and the percentage of eosinophils (EOS) in peripheral blood and disease activity and severity in bullous pemphigoid (BP) patients. Here, COL17A1 is linked to bullous pemphigoid.