I've had a red patch on my forehead for about a year. It is flat about and about an inch in diameter, it doesn't really bother me outside of appearance but after doing some research on what it is, I'd like to put myself at ease and see if anyone have experience with this. I have a history of dry skin but that usually resolves itself after a few days. How can I tell if this is a fungal infection, Actinic Keratosis, Eczema/psoriasis, or something more serious?

thank you.