Stress profoundly impacts memory, manifesting as both acute and chronic impairments. The physiological and molecular mechanisms underlying this are complex and interconnected, involving multiple brain regions and signaling pathways. Acute stress, characterized by the activation of the hypothalamic-pituitary-adrenal (HPA) axis, leads to a surge in glucocorticoids like cortisol. Elevated cortisol levels can interfere with memory consolidation and retrieval by modulating synaptic plasticity in the hippocampus, a crucial brain region for learning and memory. This modulation occurs through glucocorticoid receptor (GR) binding, affecting processes like long-term potentiation (LTP) and dendritic spine morphology. Excessive cortisol can also impair neurogenesis in the hippocampus, further contributing to memory deficits. Beyond glucocorticoids, the sympathetic nervous system, activated concurrently with the HPA axis, releases norepinephrine, influencing amygdala activity and potentially disrupting memory encoding through its effects on stress hormone release and modulation of attentional processes. Chronic stress, however, leads to more persistent and potentially irreversible changes. Prolonged exposure to elevated glucocorticoids can result in hippocampal atrophy and neuronal damage, contributing to long-term memory impairments. Furthermore, chronic stress is associated with dysregulation of the HPA axis itself, leading to a hyperactive response to subsequent stressors and exacerbating memory deficits. At the molecular level, stress impacts numerous signaling pathways. Increased levels of pro-inflammatory cytokines, like IL-1β and TNF-α, contribute to neuroinflammation, damaging neuronal structures and disrupting synaptic function. Furthermore, chronic stress can lead to oxidative stress, resulting in the accumulation of reactive oxygen species (ROS) and neuronal damage. These molecular changes contribute to impairments in synaptic plasticity, neurogenesis, and ultimately, memory function. Understanding the intricate interplay of these physiological and molecular mechanisms is crucial for developing effective interventions to mitigate stress induced memory impairment, potentially targeting specific pathways such as GR signaling, neuroinflammation, or oxidative stress. Further research is needed to clarify the precise temporal dynamics and interactions among these mechanisms to optimize therapeutic strategies..