From Longman Dictionary of Contemporary Englishstomachachestom‧ach‧ache, stomach ache /ˈstʌmək-eɪk/ ●●● S3 noun [countable, uncountable] MIPAINpain in your stomach or near your stomachTHESAURUSstomachache pain in your stomach or near your stomachHe said he had a stomachache and didn't want to go to school.I've got bad stomachache.indigestion pain or uncomfortable feelings that you get when your stomach cannot break down food that you have eatenShe frequently suffered from indigestion.If I eat onions, they give me indigestion. food poisoning a stomach illness caused by eating food that contains harmful bacteria, so that you vomitI got food poisoning while I was on holiday and had to spend the day in bed.Two of the customers has to be taken to hospital with suspected food poisoning.nausea the feeling that you have when you think you are going to vomitA feeling of nausea suddenly came over me.constipation the condition of having difficulty in getting rid of solid waste from your bodyDo you suffer from constipation?diarrhoea British English, diarrhea American English an illness in which waste from the bowels is watery and comes out oftenThe main symptoms are diarrhoea and vomiting.Some dairy products can cause diarrhoea.
Examples from the Corpus
stomachache• The kids with separation anxiety were very likely to have stomachaches or other gastrointestinal problems.• Tom calls to complain about his stomachache. 