Drink plenty of water because fiber-rich foods absorb water, adding bulk to your stools, thereby making them softer and easier to pass.
Herbal laxatives help relieve constipation. Laxative teas from passionflower, aloe Vera, senna, buckthorn, rhubarb, and cascara sagrada are known to stop constipation. Remember though that while senna laxative can be bought as an over-the-counter product, it is meant for short-term treatments.
Unless you are under medical supervision, you are advised not to have such laxative teas or over-the-counter products longer than one to two weeks. They may help relieve constipation, but excessive use can make you addictive to them… more information on constipation cure.