Headaches Headaches are common medical complaints. For most, a headache is an annoyance that comes and goes. But when they start to occur regularly, studies, work, family and social activities can be affected. It can also cause significant concern and anxiety.[Please download the PDF file if you are unable to view the image below.] 1of6 Content serves as a guide only. Seek the advice of your doctor for more details Information correct as of April 2020 Reproduced with permission from the National Neuroscience Institute (NNI)