I realise it is a while since you posted your question but since I have spent most of my adult life from the age of nineteen years old, suffering from bowel obstructions, I really do know a lot about them.
For one thing as I said before, adults can definitely suffer from Intestinal Obstructions. I am in my fifities now and my last obstruction requiring surgery, was only four years ago.
I have outlined here below the other information that I hope you
will find useful as I know this was information you were asking for answers to.
I apologise again for the delay but I haven't been well myself and I have only just noticed it.
Here is the information:
Depending on the level of obstruction, bowel obstruction can present with abdominal pain, abdominal distension, vomiting, fecal vomiting, and constipation.
Bowel obstruction may be complicated by dehydration and electrolyte abnormalities due to vomiting; respiratory compromise from pressure on the diaphragm by a distended abdomen, or aspiration of vomitus; bowel ischaemia or perforation from prolonged distension or pressure from a foreign body.
In small bowel obstruction the pain tends to be colicky (cramping and intermittent) in nature, with spasms lasting a few minutes. The pain tends to be central and mid-abdominal. Vomiting occurs before constipation.
In large bowel obstruction the pain is felt lower in the abdomen and the spasms last longer. Constipation occurs earlier and vomiting may be less prominent. Proximal obstruction of the large bowel may present as small bowel obstruction.
Causes of small bowel obstruction include:
Adhesions from previous abdominal surgery
Hernias containing bowel
Crohn's disease causing adhesions or inflammatory strictures
Neoplasms, benign or malignant
Intussusception in children
Foreign bodies (e.g. gallstones in gallstone ileus, swallowed objects)
Large bowel obstruction
Causes of large bowel obstruction include:
Inflammatory bowel disease
Colonic volvulus (sigmoid, caecal, transverse colon)
Benign strictures (diverticular disease)
I trust this will assist you with your questions.
Good Luck Beautbabe.