Welcome to HCM.
As per your problem it appears that you are applying benzoyl peroxide
in excess. Among all of the creams which you are using only Benzoyl peroxide is having the propensity to cause irritation, burning sensation and dryness. So the very first thing is stop using it for few days so that irritation part subsides. Now for using other of cream, Faceclin can be continued in day time and melaglow at night time ( But in a very low quantity). If at all you are feeling roughness then can stop all the topical treatment for few days and then can restart with bit caution. But as you say you have lot of visible scars
and slight pigmentation , I would suggest some better option such as Tretinoin
0.025% with glycolic acid
and Azealic acid at night time under medical supervision. I think you are under treatment with dermatologist
so you should ask for the same and can get better relief of your problem.
Have a healthy skin,
Dr Sanjay K Kanodia