Cracks appearing

[kerry123]

Hello I have cracks appearing all over the house I think it might be the plaster cracking.
It has been done over 7 years ago and was cracking then but being a single mum I haven't had time or have a foggy what to do.

The big one is in the cupboard that came after my neighbour did a loft conversion.

Any help would be appreciated.

 

[Wayners]

Plasterboard I guess? The cracks are in straight lines following plasterboard joins.
Normal to get cracks above windows and door at the top corners.
Also I can see stress cracks that start and stop with a bit of a curve. Thats the surface plaster being stretched with movement.

Buy a box of toupret powdered filler.
Scratch out the cracks a bit bigger to allow for filler.
Fill in.
When dry 120 grade sand.
Paint over
That's the easiest way and see how long it lasts