Have a son 12 years old has ibs is it normal for him to have pain after urine at the moment he has stomach pain and diarrhoea taking biscopan?

Intestines = common: location for expression of stress issues (ALL life is stressful; more so at younger ages) which is always expressed within our bodies (in a flash), we only become aware if/after body functions become symptomatic. If individual feels unable to address (possibly solve) issues other ways then dysfunctional/damaging body behaviors may become obvious. Be aware: http://goo.gl/Blh6rW. Self study issues?