If you live in a house long enough, you will eventually face a door that refuses to cooperate. Maybe it catches on the jamb when the humidity rises, or it scrapes against the floor as the seasons change. That sticking interior door might seem like a minor annoyance, but over time it can damage the paint, dent the wood, and make you avoid that room altogether. The good news is that you can almost always fix it yourself without calling in a professional, and you likely have the tools already sitting in your garage or junk drawer.

First, take a close look at where the door is hitting. Open and close it slowly, watching the gap between the door and the frame. The rubbing spot is usually either along the top edge, the latch side, or down at the bottom. If the door drags along the floor, you are dealing with a different set of issues than if it pinches against the strike plate. The fastest way to identify the culprit is to run a piece of paper around the closed door’s perimeter. Where the paper stops sliding easily, that is your trouble zone.

For doors that stick on the side or top edges, the most common reason is humidity. Wood swells when it absorbs moisture from the air, making the door slightly bigger than the opening. This happens most often in bathrooms, kitchens, or during rainy seasons. The solution is simple: you need to remove a small amount of wood from the rubbing edge. Before you grab a plane or a sander, do yourself a favor and check the hinges first.

Sometimes a sticking door is actually a sagging door. The screws that hold the hinge plates to the frame may have loosened over the years, letting the door droop a fraction of an inch. Try tightening every hinge screw with a screwdriver. If the screw spins freely without biting, remove it and stuff the hole with a couple of toothpicks coated in wood glue. Snap off the ends and reinsert the screw. This trick gives the threads something fresh to grip. Often, that single fix will lift the door back into alignment and solve the sticking problem entirely.

If tightening hinges does not work and you have confirmed the door is rubbing against the jamb, you will need to remove a little material from the door edge. Remove the door by tapping out the hinge pins. Place a folded towel or a block of wood beneath the door to support it. Then, using a hand plane or a power sander with medium-grit sandpaper, work slowly along the marked area. Go a bit at a time and test the fit frequently. It is far easier to take off too little than too much, because once the wood is gone you cannot put it back. For a cleaner finish, run a piece of fine sandpaper over the area afterward, and then seal the bare wood with a coat of paint or clear finish. Otherwise, the next spike in humidity will cause the exposed wood to swell right back into the same problem.

Now, what about doors that stick at the bottom? This is almost always a door that is too tall for its frame, or the floor has settled unevenly. Before you reach for a saw, check whether the bottom of the door has a built-in gap or a sweep. If the sticking is only in one spot, the floor might have a high point. That can sometimes be fixed by sanding or planing the bottom edge of the door. Mark the spot, remove the door, lay it flat on sawhorses, and use a hand plane or a belt sander to remove the high area. Work from the edges toward the middle to avoid splintering the wood.

If the door drags evenly across the entire threshold, you need to trim the bottom of the door by a consistent amount. Measure the gap between the top of the door and the frame, then measure the gap at the bottom. The difference tells you how much to cut. Use a circular saw with a straightedge clamped to the door as a guide. Score the cut line with a utility knife first to reduce chipping. After cutting, sand the edge smooth and apply a coat of primer and paint to protect the wood.

Sometimes the cause is not the door itself but the hinges. If a hinge is bent or has a loose screw that won’t tighten, replace it. Also, make sure the hinge mortises are cut deep enough. If a hinge sits too proud, the door will bind. A quick fix is to remove the hinge and chisel the mortise a tiny bit deeper. This is a subtle adjustment, but it can make a world of difference.

A sticking interior door is one of those problems that seems small but can slowly drive you crazy. Tackle it when you first notice it, and you will save yourself from bigger headaches later. With a little patience and a few basic tools, you can have that door swinging freely again in an afternoon. Once you do, you might even start looking for other small fixes around the house that have been waiting for your attention.