I used a gel called cicatricure, prescribed by my plastic surgeon.

I had the same problem a few months ago, I consulted a dermatologist and started a treatment based on Benzoyl Peroxide, got great results with a few months of use. Consultation with a dermatologist is very helpful.

I'm allergic to gluten, and the worst part is that it took me a long time to figure it out. It was very bad without knowing why.