young man having a stomachache

abdomen ache acute alimentary appendicitis bad bellyache blue calculus caucasian close colonitis constipation cystitis diarrhea enteritis expression food gastric gastritis gripe groan gut inflammation intestine intoxication male man moan nausea norovirus obstipation pain painful peritonitis poisoning probiotics renal serious sickly side stomach stomachache strenuous ulcer urethral virus vomiting young