What sort of damp is this?

[Notch7]

It may be that the walls are very cold, last few days we’ve had very cold days and then warmer.

If it’s simply walls getting cold then plaster absorbing moisture through condensation, insulated wallpaper like wall rock might be a good solution (I appreciate that may be difficult in your family circumstances)

I am sorry to hear you are bedbound and things are tricky, I hope you get a solution to the damp

 

[accelerator]

OK but I would still think water is getting into the wall somehow. Without us knowing exactly the layout of the house or the surrounding ground/drainage, it's hard for us to say what it could be, but I do still think it is likely to be a rising damp issue rather than a condensation issue.

 

[accelerator]

As they appear to be concrete walls, then I guess it could just be cold transmitted from the ground, which would explain why the mould is only low down.

Are you heating the room?