There was no significant difference between groups I, II and III in terms of age, prolactin levels, serum IgG4 level, duration of steroid use, interval between pregnancy, follow-up period, pregnancy (delivery) status, breastfeeding, localization, OCS and smoking, breast discharge, abscess and mass formation, but there was a statistically significant difference in the presence of redness and edema (p = 0.018) (Table 2). Here, PRL is linked to abscess.