If you have gotten a dent in your car, you want to get it taken care of as soon as possible. The longer the damage stays on your car, the higher the risk of further damage is. A dent can lead to rust, which can to holes, body damage, and damage to the chassis of your car. Those things are more expensive to fix, so you are going to have to lay more money out to do the repair. There are some things that you can do on your own to try to repair the damage.
DIY Dent Repair Kits
There are dent repair kits that you can buy at auto shops. These kits generally have dent pullers in them. The dent puller has a point that you adhere to the car. Then, you put the rest of the dent puller on the car. The larger part of the puller will go outside the dent, so as you turn the screw on the puller, the dent gets pulled out so that it's level with the rest of the car. Depending on the size of the dent kit, you may have several different puller sizes because they aren't one size fits all.
Depending on the size of the dent, how old it is, where it is, and if your car's body is plastic, you may be able to use some hot water to get the dent out of the car. The way that this works is that you can pour some hot water over the area, and then reach under the plastic panel so you can push the plastic back out into place. The hot water should soften up the plastic enough for it to be malleable. You may have to keep pouring more water over it in order to keep it soft enough to manipulate. You can also try using a hairdryer so that you can heat up the area. If you can't reach the backside of the dent, you can use a plunger in a pinch, because it has a suction feature.
If you aren't having any luck at DIY-ing your dent repair or you don't want to worry about causing any further damage to your car while you are trying to get the dent out, you should take your car to an auto body repair shop so that they can do the work and fix the damage for your and get your car looking good again.