After a severe eczema/acne flare-up,there is now a small beige patch on my skin. is there any treatment to make it "disappear"?does it ever go away?

Eczema: Tough to tell without a picture of it, but with lots of eczema flareups, you can have what is called post inflammatory hypopigmentation to the skin. Basically after a flareup where there is inflammation going on, it can heal with a lighter color skin tone to it. Can take some time for that to improve and go back to normal.

Beige patch: You might try using virgin coconut oil. It may take3-4 weeks before you see results

Don't be too much: concerned about the beige spot.as long as your eczema and acne are under control . No one is perfect! If it is a cosmetic issue then you need to address this with your dermatologists or plastic surgeons