Headaches are a common issue, and they can range from being a minor inconvenience to being incredibly debilitating and leaving individuals unable to work, study, or go about their daily life. Minor headaches can be a sign of a cold or flu, dehydration, stress, or eyestrain. More serious headaches and migraines can have other causes, ranging from simple to very serious. Researchers are starting to suspect that there is a link between gut health and susceptibility to headaches. Highlighted below is an exploration of this connection.