COL17A1 and Erythema: The results indicated that in the saliva anti-BP180-NC16A positive group, the structures binding to PSA positively correlated with erythema score (r=0.66, p<0.05) and BPDAI score (r=0.71, p<0.05), suggesting that abnormally elevated fucose levels may contribute to more severe disease in patients with positive saliva antibodies.