I've been bitten by the scalp to the end point of bleeding and have pus. I think I have psoriasis, but recently have left me two lumps on the back of my head. Increased in size after a couple of days, are very painful and are causing me headaches, what could it be?
This is an infection in your scalp for having scratched so much, and now her lymph glands are reacting trying to eliminate the infection. It has reached the point of needing antibiotics. See your doctor before it gets worse.