So hey everybody ,
I am new here so I dont really know if my problem belongs to this forum , but I hope that you can help in my case anyway 
So , I used to take accutane a year ago , the acne and the pimples decreased in a significant way but after them the red marks appeared ..
this is my face right now :
So my question is :
Does the differin treatment helped or make any improvment to the sort of marks that I have ?
Thank you
Can't really see them properly but it looks like its post inflammatory erythema, and not post inflammatory hyperpigmentation. The main difference is that PIH is caused by increased melanin after the lesion has healed. The "damaged" layer of skin eventually sloughs off with time, or you can speed up the process with retinoids (like differin), which cause the skin to shed faster.
The problem here is, that doesn't look like PIH so melanin isn't your problem, therefore the differin probably won't help. If you want to read more about PIE here are a few helpful links:
[removed]