What in your body makes it so hard to quit?

You get addicted to the rush of chemicals your brain gives. Your mind associates these things with feeling good and so when you feel like you need relief, it tries to go to what used to give you peace.

the brain, everything in the body is under the control of the brain. certain parts of the brain are responsible for things like addiction. when something stimulates a part of the brain that makes you feel something like pleasure or relief the brain can then alter and so the brain sends out signals that can make you crave something in order to keep stimulating that pleasure or relief, sometimes the brain then becomes dependent on that thing to give it that stimulation which makes it so hard to quit. its just a big fight against urges to continue stimulation using that thing.

To quit what? ... In general it's hard for most people to quit any habit. It's all down to the persons ego, external influences and the determination/will power to actually want to accomplish your goal.

when you cut it releases Indonesians which gives u that high in away so thats what makes it hard to quit

Addiction alters your brain chemistry and means is comes to depend on substances and behaviours - recent research has shown that loneliness can also be a big factor

It's the brain. Most people underestimate the power of your own mind. The brain can trick you into doing things you wouldn't want to do under other circumstances.

Endorphins are released which is a feel good hormone. Self harm only releases a short term relief which is why people keep going back to it. Often the person will feel a lot of guilt afterwards and this becomes lent up emotion for the next time. Using alternatives that do not act like a depressant (drawing, exercise, singing) is better to do as they will give you relief for longer and won't have any guilt tied to them.

i must say with a 99.9% certainty that it is our minds. our minds are more powerful than an atomic bomb with more memory than any hard drive out there. the thing is ppl know to little about how to use there minds. the sub conscious part of our brain is where addictions can manifest and thus makes it hard to quit on behaviors and habits. cause most ppl dont know how to communicate with there sub conscious mind.

Your body gets into this rhythm of doing certain things. After doing whatever it is that you're doing for a while, you develop this weird sort of addiction, and your body is just so used to it that it doesn't want it to stop, forcing you to continue doing whatever it is to yourself

Your brain that tells you need the whatever makes it hard to quit like smoking or addictions to shopaholics.

Depends on what you're addicted to. If it's drugs or alcohol then it's your brain's dependency on the effects of the drug. If it's self harm then it's the release of adrenaline and dopamine when you see your own wounds and feel yourself get hurt that gives you a rush of energy and happiness.