21 male. lower left stomach pain and diarrhoea twice in last 24hrs. wind and going to toilet relieves pain some what. could it be diverculitis disease?

Diverticulitis unlik: ely as it is a disease of older persons. Far more likely at your age is a simple gastroenteritis affecting the lower intestine. Try charcoal caps for gas and loose stool, or to reset the entire system take Saccharomyces.

Your symptoms are: unlikely to be due to diverticulitis at your age. They are more likely to be due to a common gastroenteritis from a viral or bacterial origin.