Plane floorboard in a tight corner

Hey all

We've done the floors a couple of weeks ago but there's a bit I'm struggling with.
Essentially one floorboard is very swollen up but alas it's swollen up where the architrave sits on it.

Normally you would just plane it, but this floorboard being so close to the wall I cannot really.
Any piece of advice how to plane it in this odd corner ?
Thanks

It will take a while, but a belt sander will take a lot off, a detail sander in the corners

A chisel

the proud threshold board has been worked on before. thrs strips of filler showin at both edges.
if the board is swollen then it'l shrink.but it dont look swollen.why do you say its swollen?

that lining leg an architrave look wasted.maybe remove them, the door an any lengths of skirting an lift the board to see whats happened below?

planing or sanding down wont work youl end up exposin the t&g.

if you settle for just cleaning off the floor then use a sharp spokeshave and a block of wood with some sandpaper.

Thank you all for the advises!

It's been quite some time, but I thought to reply how I have made it, I hate it when I read people posting about their problems and never commenting back with the solution!

Firstly, a couple explanation: they are normal floorboards (not T&G), the word that I pick to represent the issue (swollen) was a not very representing, probably proud would have been a better choice; and lastly, taking the board off site and planing it somewhere else is an impossible option, as the brick wall is sitting on the board!


A spokeshave would probably have been the best solution but we didn't have one at hand.
Chiselling didn't go very well (probably I am not very good at chiselling)
Using a normal planer didn't go too well either as I could only plane across the grain, which essentially just made a lot of fibrous mess.

As we are anyway replacing architraves, we removed the door liners too and with a belt sander and an orbital sander we were able to bring the board down to normal level, so now we can have a square door fitted and not have that annoying gap any longer!

Thank you all for the valuable inputs!