PINCH ME Mnemonic for Causes of Delirium Delirium is characterized by acute onset, transient confusion or change in behavior, mood and alertness. P - Pain I - Infection N - Nutrition C - Constipation, Urinary Retention H - Hydration M - Medications E - Environmental Triggers #PINCH #ME #PINCHME #Mnemonic #Encephalopathy #Delirium #Differential #Diagnosis #Geriatrics