I was in a minor rear-end collision a month ago and have been having headaches ever since. Could the headaches be related to my accident?

It's certainly possible. Whiplash usually restricts neck movement, which can lead to neck pain. Headaches are also commonly reported after a whiplash injury. The good news is that neck movement often improves within three months of minor collisions. And as neck movement improves, headaches usually go away. In the meantime, you may want to talk to your doctor about how to manage your headaches and any other symptoms you may have.