Helo ! I hv been feeling a strong pulse on right side of my head only when i lay on right side since previous morning...and feel contrcting and relaxing sensation on right back of nck proceedng twrds right back of head .. v worried about it...please tell me wht it is due to ?
Most likely you have a cramping muscle in the back if your neck which is giving you a headache.  You should check with your doctor to make sure.  In the meantime try and stretch the muscle.  Use heat first such as a heating pad or shower