Even a mild intolerance that would otherwise go unnoticed may cause gas and diarrhea during a strenuous run within 24 hours of eating a dairy product.

如果有对乳糖吸收的不好的体质，那么你在摄入乳糖之后的24小时之内进行奔跑，就会产生大量排气和拉肚子的症状——乳糖吸收不好的结果就是在大肠内产生大量气体。

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The most common adverse reactions in children treated with Nexium were headache, diarrhea, abdominal pain, nausea, gas, constipation, dry mouth and sleepiness.

对于儿童患者，在使用耐信治疗中，最常见的不良反应是头痛、腹泻、腹痛、恶心、嗳气、便秘、口干及疲倦。

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Problems involving the colon include ulcerative colitis, constipation and diarrhea, gas discomfort, megacolon (enlarged colon), and cancer.

结肠疾病包括便秘、腹泻、胀气、结肠炎乃至巨结肠和癌等。

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The second group of patients, categorized as having nonceliac gluten sensitivity, have the same symptoms of abdominal pain, bloating, gas and diarrhea, but do not have antibodies or the genetic predisposition for celiac disease.

CNN: Are there degrees of gluten sensitivity?

Because they are not well absorbed, however, overconsumption of sugar alcohols can cause significant gastrointestinal symptoms including gas, bloating and diarrhea.

CNN: Is no-sugar ice cream really a healthier alternative?

The unabsorbed fat leads to gas, flatulence, diarrhea, increased bowel movements, and even, how to put this delicately, anal leakage of oily material.

NPR: Slate's Medical Examiner: Xenical OTC