Does holding in bowel movements always lead to colon cancer? If so, how can this be prevented from happening? Also, does anyone know of a good colon cleanser that I can buy at a local pharmacy chain?

Recently I’ve been having bowel movements every morning but the stools are thinner than they used to be, not too much comes out and I haven’t been had an "s" shaped bowel movement in awhile. I don’t have much stomach pain, just some aches every now and then. I bled once about a few months ago when i had a bowel movement and i was worried then. I’m worried again in regards to colon cancer. I am 19 years old and wondering why my stool is thinner and smaller..does that mean colon cancer??

I think i have bowel or colon cancer because i have been having a really hard time going to the bathroom lately. I have been like this since nov, i started with constipation every now and then and then as the months went by it started hurting more and more to go to the restroom, i bleed bright red blood from my anus and i find it in my stool. The last 1 month have been the worst, i have had excruciating pain when i go to the restroom, i don’t go to the restroom for approximately 4 to 5 days :/ which is horrible last friday i drank a magnesium citrate bottle and it helped me for the day, although my stool came out as diarrhea it still hurt and burned like hell!! on sunday i found a hemorrhoid and i have been putting preparation H. Since sunday i have been drinking Metamucil 2 times a day. since sat the only day i went to the restroom was on wednesday, only because i did an enema wash but even that didn’t help, my stool didn’t come out the way it was suppose too. I have lost a big amount of weight the past week and my appetite has dramatically reduced, my stomach always just feels uncomfortable, and is always hurting. This includes drinking lots of water and eating very healthy each day, especially eating a lot of fruits. :/ im really worried and i know i have to get it check out, but my parents don’tt always take it too seriously, it just worries me the most because im only 16 ;( so yeah i have tried everythingg from laxatives, to washes, stool softenersrs everyday, to fiber cereals and now the fiber drink but nothing is working, i really cant handel the pain anymore i cry every time. whats your guys opinion? please and thank you:)
so my problems are stomach pains, extreme constipation, weight loss, blood in stool and i bleed every time i go which isn’t often combined with a lot of pain, also a hemorrhoid and lately my anus gets itchy. also a mucus comes out too. please help

I went to the washroom and everything felt fine no pain nor strain during my bowel movement, but I looked down in the toilet and it was just bright red, then when I wiped my bottom the toilet paper was pure blood. I had not ingest beets, tomatoes or any sort of supplements, so i went to a walk in clinic, the doctor asked me some questions, touched my belly and asked me for a urine sample, then she wrote up a prescription and referred me to the ER in case it happens again. 2 days later (I was constipated) I finally have bowel movements and so I check in the toilet, again bright red so I went to the ER. The doc from ER took blood samples (results were normal) and examined my rectum..both doctors I went to believe it was "most likely" internal hemorrhoids but isn’t that suppose to hurt ? I felt no pain at all and had not been constipated till these past 2 days…I am just frustrated that they haven’t told me specifically what is wrong with me instead just the possibilities (colon cancer is ruled out since I am only 20) and keep sending me home with prescriptions and tell me to wait a few days exactly how long am I suppose to keep monitoring myself when there is an alarming amount of blood that keeps reappearing. Does anyone know what is wrong with me?

I’m 13, and in the past 4-6 months I have thought I had all these different kinds of diseases and cancers:

anal cancer
leukemia
brain tumor
breast cancer
colon cancer
skin cancer
aids
swine flu
pin worms
tape worms
thread worms
internal hemorrhoids
external hermohorrids
Proctalgia Fugax
pneumonia
human papilmovirus
west nile virus
urinary tract infection

and probably more that i cant remeber.. I can’t sleep at night thinking I have one of these.. and everwhere I go I keep thinking of these.. What can I do to stop? Whats wrong with me?
Im still really scared I have some of them..