I looked at it, and it's red enough that I think you should let a doctor look at it. You don't mention how long it's been there, but if it hasn't gone away within a few days from the onset, you should see your doctor.
So should I be pulling back my foreskin to wash that area or leave it as it is?
Have no desire to look at it, but you probably irritated the area. Try to be more gentle and it will most likely heal in the time it takes irritations to heal. If it doesn't go away in a reasonable amount of time, and you're sure it wasn't that way before, you might want to see a doc.
*do not mind the female status on my profile, I don't know how to change it. FYI I'm a cisgender male