When a character is 'Shroom poisoned, their max humours are temporarily reduced. Max humour will raise back to normal as the poisoning slowly fades away.
The effects of Shroom Poisoning are imposed after pilgrim has eaten poisonous unboiled Mushrooms or food made from it.
Recovery rate can be greatly speed up by consuming Berrymash Laxative.
"'Shroom Poisoning is caused by imbibing more or less poisonous mushrooms. The effect temporarily reduces your maxium amounts of bodily humours. The effect can usually be prevented by boiling the Mushrooms properly before eating them or using them in other cooking."