Hung Over

So you got drunk and woke up in the harbor on the bank of the river... With a new tattoo on your neck.

After finding out what happened the night before (intimidate the guy that finds you and bribe the Madame) you should go and talk to Triss Merigold in the Tavern.

She'll have a laugh at your expense and tell you she can remove the tattoo with the following.

White Myrtle Petals

Green Mold

Wolf's Aloe

But that doesn't give you a quest to complete. It is in fact a hidden quest.

You have to have the ingredients to have the tattoo removed.

All of which can be purchased in the town just outside of flotsam at the herbalist / witch living a bit away from the rest of the houses.

Once you have all the required items go back and talk to Triss again (Tavern!).

There is no dialogue to remove the tattoo, however if you just select the "Do you know how to remove a Tattoo?" dialogue option, Geralt will say that he has the items she needs.

You will then be given the option to remove it, or keep it.

If you remove it (as I did, because that's one fugly tattoo) it will immediately dissappear.

Hope this helps!