Generally eating pineapple will not cause constipation, but for patients with special constitution or taking a lot of pineapple may cause constipation. Pineapple belongs to the fruit food, which is rich in fiber and vitamins and rich in water, under normal circumstances, after eating pineapple will promote gastrointestinal peristalsis, accelerate the metabolism, improve the occurrence of constipation. However, some patients have special physique, after consuming pineapple will appear constipation, nausea, vomiting and other discomforts. If patients consume too much pineapple may also cause constipation due to stimulation of the gastrointestinal tract. Constipation is mainly due to the gastrointestinal tract fiber content is too small, and pineapple will increase the content of fiber, so generally eating pineapple will not cause constipation.