Severe head /shoulder pain frequently.

She is getting severe head pain quite frequently ,whole head especially middle and back side. She is unable to bare the pain and some one needs to press(not massage)the whole head with lot of pressure to make her feel little relaxed. She takes tablet after that, and feels better once she sleeps. Some times even tablet does not help. But this pain is little frequent recent times along with shoulder pain. She might get up middle of the night because of head pain and some times cry , as unable to bare it. She works in night shift and quite exposed to computers.Is it any thing to do with eye or eye power issues? So we wanted to know , what could be the possible reasons for it and what kind of treatment/doctors we should approach. What kind of physicians we should approach in order to identify the problem.. Thank you very much in advance.