Maybe the kids swung on a gate and pulled the hinge screws out or a cupboard door was swung too wide and the screws pulled right out.
How to fix a stripped door hinge hole.
If all the hinges have loose screws it will be easier to just completely remove the door.
Easy fixes may also be ineffective in situations where a heavy door has caused hinge screws to strip out the wood on the edge of the door or the door frame.
Open the door wide and insert a wedge under the bottom outside corner to level it.
If you have a heavy door that seems to have a loose hinge it could be that either the door hinge screws are stripped or the screw hole is stripped.
This is caused by the strain that heavy doors can put on both hinges and screws.
On my cabinets the door actually fell off because a chunk of particle board fell off.
If you are fixing just a few loose screw holes for something that has multiple hinges like a door you can put a wedge underneath it to support it while you unscrew the loose hinge and fix the stripped holes.
I will repair that in a separate instructable once the door hinge is out of the way carefully drill out the hole where the screw used to be.
Another hint is to use a long screw in one of the holes in the top most hinge long enough to penetrate the stud.
A loose butt hinge will cause a door to hang crooked and stick.
When you first notice this it is important that you fix the problem as soon as you can.
Due to the design of the doors a prefab door would stick out like a sore thumb.
The wrong way is a temporary fix not cool.
How to fix a stripped screw hole.
But if the screws can t be tightened because the holes are stripped try this.
How to tighten stripped hinge screws.
After time the weight of the door will pull on the hinge and cause the door not to hang straight.
Fix it the right way not the wrong way.
Sometimes retightening the hinge screws is all it takes to fix the problem.