In two studies, some factors of oxidative stress and C‐reactive protein (CRP) were examined in patients with OLP and a significant rise in the serum malondialdehyde and isoprostane levels was seen in OLP patients as compared to healthy subjects (M. Amirchaghmaghi, Hashemy, et al., 2016; S. I. Hashemy et al., 2016). Here, CRP is linked to oral lichen planus.