Women in the coitus after headache causes: 1, because in the coitus mood in an over-excited as well as tense state, so it will lead to sympathetic nerve excitation, this time the blood vessel contraction blood pressure rises, so it will feel a headache, but this symptom will be relieved after resting; 2, due to the coitus when the blood circulation is accelerated, when blood accelerated when the blood will be concentrated in the important parts, so there will be a temporary ischemia of brain, so it will feel a headache. So you will feel a headache, you can do the appropriate relaxation of the head muscle training, can effectively improve the headache; 3, if you choose a more special posture in the same room, this may cause low cranial pressure headache, it is best to try to avoid this kind of unsuitable position; 4, if the frequent coitus will cause physical overdraft, the body is in a fatigue state for a long time, so you will feel a headache.