Headache in back of head when pressure is applied to it
Hi, whenever I apply pressure to the back of my head, most commonly in laying flat on my back while sleeping with the back of my head directly laying flat down, it gives me a headache. It feels like I have a headache, and when I accidentally sleeping on the back of my head during the night, I always wake up with a headache. This condition that I m having for a year, but I am not sure if it is something actually serious. Now I am afraid that this might be a tumor I don't feel anything else unusual about my head other than that. Thanks in advance.