The causes of occasional headache are physiological factors, such as over fatigue, tension, etc., as well as hypertension and tumor, as follows: 1. Physiological factors: over fatigue, tension and anxiety will cause the muscles of the scalp to be too stiff, which will lead to occasional headache, and generally through good rest, as well as doing massage and physical therapy, the headache can be relieved; 2. Hypertension: early hypertensive patients will show headache in the afternoon. This kind of headache is intermittent, that is, occasional headache, and it is recommended to measure blood pressure as well; 3. Tumor: Occasional headache can also appear in the early stage of tumor, and as the disease progresses, the headache will become heavier and the headache will last longer and longer, and it is recommended to do cranial CT in hospital to make a clear diagnosis. In conclusion, even occasional headache should not be taken lightly, and it is necessary to go to the hospital for consultation to clarify what causes it.