rash in beard area

Hey everyone I've had this problem ever since I was almost 16 that has caused me to be extremely self-conscious. In my mustache and beard area there is this red/pinkish inflammation and rash. It even is there before I shave. I have basically resorted to having stubble all the time to hide the redness. If I shave it gets even worse and becomes even more red and inflamed. This condition is always visible and you can even be seen through my stubble. It's so embarrassing. It shows up worse in pictures. I've seen my dermatologist twice who just keeps saying I have "sensitive skin" and has given me a few eczema treatments which have been no help. I don't know what to do. I've spent hours of researching on the internet about skin conditions that would cause this problem but none seem to be my problem. There's no "bumps" per say but the skin is raised from the rest of the mustache/beard area . Interestingly, my cheeks are fine and do not have this inflammation. I am so desperate to figure out what is causing this problem and how I can fix it! any advice would be greatly appreciated.