If you have some peppermint oil, applying some peppermint oil to the hickey will get rid of the hickey.
Peppermint toothpaste can also work to get rid of your hickey and even rubbing a cold spoon over the hickey will soothe and get rid of the hickey.
When you apply the peppermint oil or even peppermint toothpaste to the hickey you might feel a tingling sensation which is normal and will fade overtime.