Just noticed this brown stain above my living room window. I don’t have a ladder at the moment so can’t reach it to touch it but the wallpaper near it is starting to lift so I think it might be damp. But it’s on the ground floor and there doesn’t appear to be anything else around it or in the room above it. My bathroom is on the floor above too but to the right. Could it be water travelling from the bathroom down or getting in from outside? It hasn’t rained locally since Saturday.