"Normal" poo, says Hong Kong gastroenterologist Choi Wai-lok, registers as types three, four or five on the scale. Types one and two are hard, six is very loose and seven liquid. Normal poo ...

This includes tiredness or unexpected weight loss. Or if you have bleeding for more than 3 weeks with no other symptoms. If your poo is very red or you have very loose poo (diarrhoea) with blood, you ...