The causes of vague pain on the top of the head are mainly considered as follows: 1. It may be a tension headache, which usually occurs when you are tired, poorly rested, or emotionally tense, with vague pain in the head or similar to tightness. 2. The vague pain on the top of the head may also be caused by factors such as cold, fever, or elevated body temperature, and the patient should also have muscle aches, cough, and runny nose, etc. 3, It may be caused by poor rest, fatigue, lack of sleep, or cervical spine disease, strain on the neck muscles, etc., causing vague pain in the head. No matter what the cause is, if the headache is not serious, you can take pain medication, or do physical therapy or massage to relieve it. However, if you have a sudden severe headache, you must pay attention to seek medical attention as soon as possible and not take pain medication blindly to avoid delaying the disease.