Red scarring

Hi everyone, I’m looking for some advice; I used to get blisters on my heels, and now those areas have developed red patches. There’s no raised skin or pain, but the redness seems like scarring from the previous blisters. The affected skin is also more prone to blistering again.

I’ve noticed the redness looks worse after a shower or when my feet are warm. I don’t wear tight shoes, and I let the area breathe, but I haven’t seen any improvement. Is there anything I can do to help fade the redness or strengthen the skin? Any advice would be appreciated!

Thanks in advance!