Why do people get cancer

Why do people get cancer
I feel so bad about every thing I said mean about my dad,
Because he is dieing he only 40 years old.
They said he only has like 3 weeks,
And is their some thing I can say to to him to make him feel better or any thing./
Should...

I just act like I dont know about it or what?

Sweetie,
Do you Love Your Father? Then all you can do is let him know: That no matter how much you may disagree or fight or even say things, that later we are sorry for, that in the end, most of all YOU LOVE HIM!
And to let you know: everyone in this world has cancer cells in their body. These cells are what we call dormant or asleep. In some of us these cells wake up and in some of us they don't. But when they awake they seem to just take over.
So, you know I am 47 and I have had the same lose to cancer. Spend as much time as you can with him, if you Love him? If you don't then you my feel the lose of your father more after he passes.
There is one more thing: no matter what the Doctor might say it CAN BE LONGER before he goes! His Will to Live has a lot to do with it. And sometimes just knowing that your baby girl LOVES you no matter what, my keep him wanting to live longer.

I think the only thing to say to him is to think positive, it works even in cancer... faith can move mountains... im sorry to hear about your dad..

first of all, I am so sorry to hear about your father.
second of all, cancer is caused when you dont have enough blood cells to fight of infection. (or something like that, I know it is something to do with blood cells)
thirdly, I think you should let your dad know that you love him, and that your there for him. stay as positive as you can, but I know it will be hard. When my grandmother got sick, I spent a whole month sitting with her in the hospital, and it was the hardest thing I ever did, but at least she knew I was there, sometimes thats all people need, is to know that someone loves them.

Keep him in your prayers and make him comfortable - make some memories - might help to sit down and put everything you'd like him to know before it's too late...you and he will be in my thoughts and prayers - I hope he talks to a Minister to ensure he's ready.

Let him know you LOVE him so much. Talk about the good times you've both had. Just be there with him. Show him you care.
I'm really sorry to hear about your dad! I really am. Funmail me if you need anything.

Three weeks!!! When did you find out or what type of Cancer. I had cancer 10 years ago but mine responded very well to treatment. There are a lot of different cancers some deadly and some very curable.

Is he still drinking and having the same verbal abuse toward you even after knowing about it? Is he treating you better? After you talk to him and everything you should go and get some counseling. I think all the falling in love or all this crushes you are getting on different boys is because you are filling the void of your father not giving you the attention that you needed.

Very dangerous as you will always be looking to fill that void and end up later in life with another guy that will more likely will resemble your dad in the way that he treated you.

Do you have siblings and where is your mom in all of this?

I dont know the kind of cancer.
he drinks and smokes.
I LOVE HIM!!!
I live with my mom but I go over their a lot because my best friend live by him like 2 house down,
and I dont tell her this stuff because she will never let me see him again .
I know he dont mean half the stuff he says but it bugs me some time.
and he has kidney problom thats why he can tack chemo,