I'm getting localized acne again.

I think my condition was unstable because I was struggling with my studies and under a lot of stress, so I broke out in a lot of acne all over my face throughout the semester. I went to a dermatologist, got a prescription, and took medication, and it calmed down a bit, but the following semester, acne started popping up again on my forehead.

They are bursting one by one, leaving red dots.

I've tried changing my lifestyle and being careful with greasy foods to prevent acne, but I'm not sure if it's just my pre-existing constitution or if that's why it keeps happening.

Why is this happening?

Is it still ongoing?