Why do i get the same pimple on the same spot?

for about 4 years i keep getting the same pimple on the same exact spot in my forehead. it happens about every 4 months. it starts off with a really huge bump on my forehead. no white head and no puss visible just a huge bump. a couple days later when i try to pop it dark blood with puss comes out. i also get really bad headaches. why does this happen on the same spot? and how to get rid of it?|||maybe because since you pop it, the bacteria isn%26#039;t all out and that%26#039;s why you keep getting the pimple in the same spot. As bad as this might seem, next time you get the pimple, don%26#039;t pop it and see what happens.|||it always happens..i think going for a facial would help more than applying cream to it|||ummm I%26#039;d recomend going to see a dermotolgest