What food to eat if you have constipation?

I know you should eat and drink more water, and grains, but could you give you me some recommendation for healthy, nutritious, and high in fiber, low in sodium food or snack?

Also, how does constipation occur?

i have been constipating for about 1 week, and i am taking medication from doctor, i need a faster way to cure it, so i could be back on the track.

The best long term cure I've found is a primarily vegetarian diet, plenty of water, some probiotics, proper weight management, and lots of daily exercise.

This is kind of my "cures what ails ya" strategy. Works for just about everything. Things have been working smoothly ever since.

What causes constipation is a bit complicated. Has to do with diet and flora (bacteria) balance in the intestine….

http://en.wikipedia.org/wiki/Constipation

What is the difference between constipation and severe constipation?

I want to know what is the difference between constipation and severe constipation, as far as definition. causes and symptoms. Thank you
Constipation is where you have to strain to get the stool out. Severe constipation is where you need to take medical or physical action to empty the bowel. Both have the same essential cause which is slowed transit time in the bowel leading to dehydrated, hardened stools. Here is the link to the bristol stool chart – with sufficient fluids and fibre a normal stool is a 3, 4 or 5. http://en.wikipedia.org/wiki/Bristol_Stool_Scale