I Have A Pulsing Large Bump On My Forehead. I

I have a pulsing large bump on my forehead. I thought it was a pimple and when i went to pop it, alot of white, hard stuff came out, but it has now become increasingly swollen, from my hairline to about mid-forehead, and the surrounding area where my hair is at is extremely itchy, and i have developed bumps in front of both ears near my jawline that are extremely sensitive to touch along with sensitivity on my blood arteries near my eyebrows, again all combined with a terrible headache