It’s long been known that people who suffer a major concussion can lose their sense of smell temporarily and also develop effective problems, such as anxiety and depression. Now, as part of the latest study, scientists have found that’s true even for people who get a minor concussion. In a study published in Brain Injury, a team of researchers compared 20 hospital patients who had mild concussions to 22 who’d broken limbs but had no concussion.
Within 24 hours of their accident, just over half of those with mild concussions had a reduced sense of smell, versus only 5 per of the patients with broken bones. A year later, although their sense of smell was back to normal, the first group of patients had significantly more anxiety than the control group.