Pimple On Face Became Sore After Popping, Bleeding After Scratching, Noticed Black Dot. What Is It?

I had this pimple on the right side of my face right by the hairline recently, it waited until it became a whitehead and I popped it. A couple hours later, it began to scab over, and get very sore. The scab was like a very dark brown, nearly black. I accidentally scratched it, and it began to bleed then I noticed a tiny black dot. What is it? Is it a spider bite? I haven't had any symptoms to my knowledge. I've had bad headaches but that's normal. I'm just curious to what it is. I popped the bump on Tuesday and ever since, it has bothered me.