showed that CXCL9, CXCL10, CXCL11, and CCL5 expression was higher in OLP than in normal tissues, which can recruit T lymphocytes, and the ligands of CXCR3 are CXCL9, CXCL10 and CXCL11, while the ligand of CCR5 is CCL5 (81). Here, CXCL9 is linked to oral lichen planus.