IRCT20190901044666N1 IRCT 2020-09-03 Iran University of Medical Sciences Evaluation the Effect of Tranexamic Acid by Mesotherapy on Persistant Post Acne Erythematous Evaluation the Effect of Tranexamic Acid by Mesotherapy on Persistant Post Acne Erythematous 2020-08-31 anticipated 30 Complete https://irct.ir/trial/43558 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. 2 Persistent Post Acne Erythema. Intervention group: In this study, one side of each patient's face is considered as a control and the other side of the patient's face is considered as a observe, and the two sides of the patient's face are compared during the treatment period and one month after the completion of treatment. On the right side of each patient's face tranexamic acid as mesotherapy (Tranexamic Acid ampoules by one cc syringes used for injection) in the area with erythema due to acne inflammation intradermally at intervals of one centimeter in the amount of 0.1 cc Is injected. On the left side of the same patient's face, no medicine is injected and is considered as a observe. The second and then one month after the last visit are photographed and compared with the help of Delta scale in a quantitative and qualitative way. And then compared.. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Not clear