I do have a similar patch of skin on my right cheek, it is just less prominent. I have now noticed the same thing on my chest. It was the same colour as the skin patch on my cheek, but yesterday it was red – I will attatch a pic. Today it is back to same colour as cheek.
The first pic has a small vertical red line right in the middle of the front of my neck. This happens after an intense stinging feeling there. The second pic shows the patch of skin on cheek and chest. Third pic is close-up patch on chest.