Acne keeps popping up.

I thought it was something that only happened briefly when I was a student, but even now that I'm an adult, I repeatedly get small bumps and red acne on my forehead. It feels like as soon as one goes away, another one pops up, so they don't seem to go away easily.

I wash my face thoroughly and change my pillowcase frequently, but I don't see any significant change. I'm wondering if men are more prone to this because they produce more sebum, or if there are other causes.

Would it be helpful to receive treatments at a dermatology clinic, such as extractions, anti-inflammatory injections, Aqua Peel, or laser therapy? I am curious about how many sessions of acne management treatments are typically required to see results and whether they also help prevent scarring.

If there are any people who have suffered from forehead acne for a long time and improved through dermatological treatment or procedures, what kind of care did you receive?