As for the differences, the potential pathogenesis of GLM is as follows: α1‐antitrypsin deficiency, oral contraceptives, microbiological agents, ethnicity, gestation, birth, and breastfeeding, while the pathogenesis of PCM is these points: the activation of IL‐6/JAK2/STAT3 pathway, anaerobic infection, overweight/obesity, and the late onset of menarche [52, 53, 54]. Here, IL6 is linked to obesity due to melanocortin 4 receptor deficiency.