system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do different types of pain feel, well…different?

I know that pain is a signal sent along nerves to the brain, but how do different types of pain actually feel different? Like what causes the difference between a stabbing pain vs a dull ache vs burning pain, etc?
gpt
Nerves from your brain go to your spinal cord then split up and reach your internal organs then go to your skin. 

* Stabbing pain: There are many pain receptors on your skin and they are close together. So the ones that are damaged report pain to your brain and the ones right next to them that aren't damaged don't report pain. So you can point to the exact spot that hurts. This is sharp stabbing pain because it's like a fine knife going into your body.

* Dull ache: This is often used to describe pain on internal organs where the pain receptors are more spread out. So you can't pinpoint exactly where the damage is because one pain receptor is covering lots of area.

* Burning pain is often used to describe when the nerves themselves are damaged.

* Colicky pain is when a hollow organ squeezes over something hard. Your gut pushes food forward like when you squeeze the last bits out of a toothpaste tube. If there is a hard mass inside, you'll feel pain when it squeezes around that part then the pain goes away when the squeezing moves forward. Then it comes back at the next squeeze. The same goes if you have a hard stone in your urinary tract. 

* Radiating pain is when your brain confuses the internal organs with the parts of skin that share the same nerve. For example, the nerves that cover your heart then go on to cover your left arm. So if you have a heart attack, your brain might confuse the heart pain with left arm pain. This feels like the pain starts in your heart, but then moves out to your arm.

There are many other terms, but this gives you an idea of how specific injuries and the anatomy of nerves affect the terms we use. The actual terms aren't that important. There are hundreds of languages, but all humans experience the same types of pain. They're just helpful for doctors to try to narrow down what's going on when they first meet you.