I've been dealing with constant itching and irritation in the pubic area. I have these white or gray spots with a light pink center, and the skin in that area looks different from the surrounding skin. It seems like it's spreading, reaching the groin and even the scrotum. The itching is really bad, and it feels like it's covering most of the area between my thighs. What could this be, and how should I treat it?

That looks like fungal infection which needs oral and topical antifungal medication and personal hygiene is the main stay, visit Dermatologist for appropriate management.