Can you erase a memory?

Do you have a memory replaying in your head, out of your control, taking you back to somewhere you’d rather not be?

Why is so hard to forget bad memories?

Can you easily recall what happened on your holidays five years ago? Memories from a long time ago are generally pretty vague, but, if you’ve had a traumatic experience you can be haunted by painful, vivid flashes of memory triggered at random times.