I have had a bump on the top of my head for 20+ years, over the past 10 years it has been growing it is now maybe a 1/2" wide and 3/8" tall, and over the past 3 years another one has been growing rapidly on the side of my head and is now about the size of the other one. They are hard. Well about a week ago the one on the side had started to become very painful and soft, when I pull my fingers through my hair I scratch it with my nails and I noticed a scab one morning and removed the scab and liquid came out, then I squeezed it and a lot of pus came out. I have squeezed it again last night in the shower and it is still squeezing out pus. Should I be alarmed?