I’ve noticed three distinct bumps on my face; the one on my forehead is particularly prominent. These bumps differ from acne as they cause neither pain nor irritation upon contact. They began to appear approximately one to two years ago, and their origin remains unclear to me. I suspect they might be the result of clogged pores, although I cannot say for certain. My skincare regimen includes a cleanser, followed by niacinamide in the morning and retinol in the evening. What procedure can help?