are creaking floorboards something to be worried about

[ReapersSideKick]

the floorboards in rest of house seem to be ok but for some reason the floorboards in my bedroom seem to creak more the house was built in the 1940s i believe

Do they move or feel soft/flexible when you walk on them?

only one but that was a workman doing something a few years ago but didnt fix floorboard after it was lifted so now its soft but the rest are ok

Then I don't reckon you have anything to worry about.

Probably just needs to be nailed back down to the joist. Check for pipes and electrical wires first though.