### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, i am a 23 year old male, and have recently been suffering from a pressure sensation mostly in the back of the head. It started several days ago with somewhat of a mild headache which was quite dull. Since then my head doesnt really hurt anymore but i do feel constant pressure at the back of my head which sometimes spreads towards my temples and ears area. I also have slight nausea but not at the stage that i feel i need to vomit. This pressure feeling is prevalant throughout the day and i havent noticed it getting any worse at any stage of the day. Any advice about what this could be and what i should do would be much appreciated. Thanks

### output:

Degree understand your concerns went through your details. I suggest you not to worry much.  As you posted this question in mental health section, I try to answer in that view point. Pain at the back of head and nausea are commonly associated with gastric derangement. Then for you, it became obsession. You had that disturbing sensation once. You expected it to happen again and tried. Then you started experiencing it as you were expecting it. Then your body brought the familiar symptom because you are expecting it. Then you started worrying that the symptom is coming again and again and expect it. Body brings it again as you are expecting it. You become worried and so on. That is obsession in simple terms. Ignore it and the problem vanishes. To be sure, you should visit a physician. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.