Water Damage from Rain

[James Nix]

Hi Everyone,

Sorry for the blurry pics but this is pics of a 2nd floor unit bathroom of a duplex I own. Just wanted thoughts on what you think this could be?

Also should I call a roofer or plumber to handle this problem or just handyman? 

The bathroom has a sky light & it’s a 1950’s building so it has them old plaster walls.

Thanks in advance for any input 

[Nathan Gesner]

Quote from @James Nix:

It looks like the water is coming in from the skylight. That's a common culprit and usually an easy fix. Get a roofer up there to check it out and seal it up.