older asian man is having stomach ache pain concept with background. senior or mature people suffering from digestion

abdomen abdominal ache acid adult anisakis background cancer colon constipation diarrhea digestion disease dyspepsia eating elderly esophagus gastric gastritis gastrointestinal gut guy health healthcare healthy hospital inflammation insurance intestine isolated male man mature medical norovirus old older pain people problem reflux retirement science senior stomach stomachache suffering symptom tummy ulcer