I am a 24 yr old female. I recently have had surgery in December. I broke my clavicle and dislocated my sternum. Two days ago I woke up with a bad headache ... Then noticed a lump behind my head on my hairline, at first I thought maybe ingrown hair, pimple because that was the pain I was feeling but it was not only throbbing but giving me this weird headache in the back of my head. I m usually fairly healthy and have 3 small children. I have had a history of a tumor in my right forearm that was removed and replaced with bone marrow 10 yrs ago. It is immovable and painful, it has increased in size over the past 2 days. It is also very stiff. No putter skin marks or bruisings around area or anywhere near. The lump I d say is the site of a chic pea.