Forgetting where you placed your keys or walking into a room and forgetting why you went there are common experiences. However, during midlife, periods of intense stress may make these memory lapses feel more frequent and noticeable. Researchers say there is a biological explanation for why stress can affect memory and concentration.

How Stress Affects the Brain and Memory

When the body experiences stress, it releases cortisol, a hormone that helps prepare it to respond to challenges. While short-term increases in cortisol can be useful, prolonged stress can keep cortisol levels elevated for too long, potentially interfering with the brain’s ability to store and retrieve memories.

Chronic stress can affect several areas of the brain involved in memory and emotional regulation, including the prefrontal cortex, amygdala, and hippocampus. The hippocampus plays a key role in forming and accessing memories, and ongoing stress may make it harder for people to create new memories or recall information they already know.

Stress can also interfere with prospective memory — the ability to remember tasks that need to be completed in the future, such as taking medication, attending an appointment, or making an important phone call.

Why Midlife Can Be a Particularly Stressful Period

Midlife often brings multiple responsibilities at the same time, including career demands, financial pressures, raising children, or caring for aging family members. These ongoing challenges can contribute to sustained stress levels that may affect memory and mental focus.

Hormonal changes that occur during the 40s and 50s may also influence how people experience stress and cognitive changes. Shifts in hormones such as estrogen and testosterone can contribute to feelings of forgetfulness or difficulty concentrating, especially when combined with other sources of stress.

Stress and Forgetfulness Can Create a Cycle

Memory lapses caused by stress can themselves become another source of anxiety. A person may become worried about forgetting things, which increases stress levels and may further affect concentration and memory.

This cycle can make ordinary moments of forgetfulness feel more alarming, even when they are temporary and related to stress, distraction, or fatigue.

When Memory Problems May Need Medical Attention

Occasional forgetfulness is common, but persistent or worsening memory difficulties should be discussed with a healthcare professional. A doctor can help determine whether symptoms are linked to stress or whether other factors, such as thyroid problems, nutrient deficiencies, or sleep disorders, may be contributing.

Ways to Support Memory and Reduce Stress

Managing chronic stress may help protect cognitive health. Helpful habits include maintaining regular physical activity, prioritizing quality sleep, practicing relaxation techniques, and finding ways to reduce ongoing sources of stress.

While stress-related forgetfulness can be frustrating, understanding the connection between stress and the brain may help people recognize the problem and take steps to support both mental well-being and memory function.