I have piles what should be the diet to be taken for preventing piles?

See below: You may be able to avoid irritating the hemorrhoids. Drink plenty of liquids, eat high fiberr foods like fruits & vegetables, take fiber supplements like metamucil, avoid constipation and straining or sitting too long at the toilet. Suppositories may relieve a little. See a surgeon for possible hemorrhoid banding procedure if persistent problems.

High fiber diet: You need to have at least 30 gm of fiber per day. Also need to drink lots of water. Can also add supplemental fiber (that dissolves in water - 1 tablespoon per day). Without water, fiber can actually make the constipation worse, which will make hemorrhoids worse.