Why Do I Have Constant Headache?
Thanks for the query.
You reported that you have had a constant headache lasting for 9 days. Did you mean - intermittent episodes of headache where each episode last for few minutes to hours that subsides to recur again?
Have you had such headaches in the past?
Did you have nasal congestion, fever, postnasal drip, etc.?
Have you had neck pain before you started working on the computer?
People who work on computer for long hours without proper ergonomics suffer from health problems - Strain on the eyes causing dryness of eyes, headaches, back and neck problems. It seems that the symptoms you have had might be related to this.
Answers to the above queries will help me think of other possibilities causes.
Awaiting your reply to discuss further.
Regards