How Does Loneliness Affect Health in Older Adults?

Loneliness in older adults is associated with low mood, poorer sleep, higher stress and inflammation, and less engagement in everyday health habits. Several pathways may contribute, and the evidence does not show a single cause. Loneliness becomes urgent when it comes with hopelessness, thoughts of self-harm, or changes in thinking or daily function. This article covers how loneliness may affect the body and mind, who is at risk, warning signs, and practical steps to try.

How loneliness may affect health in older adults

Loneliness is the painful feeling that your social connections are fewer or less satisfying than you want. It is different from living alone, and it is different from social isolation, which describes how few contacts a person has. Someone can have a full calendar and still feel lonely, and someone who lives alone may feel content.

Researchers have linked loneliness to several health concerns in later life. The links are associations. Poor health can also make people lonelier, so the relationship often runs in both directions, and no single mechanism explains it.

What loneliness may do to the body

Stress and inflammation

A study indexed in PubMed Central, Loneliness promotes inflammation during acute stress, reported that lonelier people showed a stronger inflammatory response to a stressful task. A review in the same archive, Loneliness: An Immunometabolic Syndrome, describes how long-lasting loneliness may be connected to immune and metabolic changes. These are research findings, not a diagnosis, and the biology is still being worked out.

Sleep, activity and self-care

Loneliness may be associated with lighter or more broken sleep, less physical activity, and less motivation to cook, keep appointments or take medicines as planned. Over time, these habits can add up. Several factors likely contribute, and they differ from person to person.

Heart and other chronic conditions

Loneliness and social isolation have been studied in relation to heart disease, stroke and earlier death. The findings point to an association, and researchers still debate how much is caused by loneliness itself versus other health and life circumstances.

What loneliness may do to mood and thinking

A study of daily social exchanges, Daily social exchanges and affect in middle and later adulthood: the impact of loneliness and age, found that loneliness is tied to how people experience everyday social contact and their emotions. Lonely people may feel less lift from pleasant interactions and more distress from difficult ones.

Loneliness is associated with depression and anxiety. MedlinePlus, from the National Institutes of Health, covers these concerns on its Older Adult Mental Health page, noting that depression is not a normal part of aging and that it can be treated.

Loneliness may also be linked with changes in memory and thinking. Depression can mimic dementia, which our article on pseudodementia in older adults covers. If a loved one seems newly confused or forgetful, a clinician needs to sort out the cause, because depression, medicines, infections and other conditions can all play a part.

Who is more likely to feel lonely

Risk factors that researchers and clinicians commonly discuss include:

• Loss of a spouse, partner or close friends
• Retirement or leaving a long-held role
• Hearing loss, vision loss or trouble getting around
• Chronic illness, pain or a recent hospital stay
• Giving care to someone else, which can be isolating (see our article on caregiver stress)
• Moving, losing the ability to drive, or living far from family
• Limited income or limited access to internet and transportation

Research on changes in social lives and loneliness during COVID-19 among older adults found that effects differed across sociodemographic groups. A separate analysis, Are U.S. older adults getting lonelier?, looked at age, period and cohort differences, which shows that loneliness is not experienced the same way by every generation.

Signs that loneliness may be affecting you or someone you love

• Pulling back from activities or people once enjoyed
• Changes in sleep, appetite or weight
• Skipped medicines or missed appointments
• Feeling sad, empty, irritable or worried most days
• Less attention to hygiene, meals or the home
• More aches, fatigue or physical complaints without a clear cause
• Increased alcohol or sleep medicine use
• Talk of being a burden or of feeling hopeless

Some of these signs overlap with depression, medical illness and medicine side effects. A single sign does not establish loneliness or any specific condition.

What can help

Small, repeatable contact

Regular short contact often matters more than occasional big events. A weekly call, a standing walk with a neighbor or a regular class can be easier to keep up than a big social push.

Choose connection that fits

The study Loneliness and Expanding Social Ties in Later Life examines motivation and perceived success when older adults try to widen their social circle, with implications for emotional health. Interests and comfort level matter, so a volunteer role, faith community, hobby group or senior center may suit one person better than another.

Address barriers

Tell your clinician about hearing or vision problems, bladder concerns, pain or mobility limits that keep you home. Treating or managing these may make going out easier. Ask about transportation programs in your area.

Treat mood and anxiety

If loneliness comes with persistent low mood, worry or loss of interest, talk therapy, medicines or both may be options. Your clinician can discuss which fits your situation. If you take a prescription for mood, do not change the dose or timing on your own; ask the prescriber. Many antidepressants carry a boxed warning on the label about suicidal thoughts in young adults, and older adults should still report new agitation, restlessness or mood changes to the prescriber or pharmacist.

Alcohol and sleep medicines

Some people cope with loneliness by drinking more or by taking sleep aids. In older adults, alcohol combined with prescription sedatives, benzodiazepines or over-the-counter sleep products such as diphenhydramine can raise the risk of falls, confusion and slowed breathing. A person who drinks heavily or takes sedatives or sleeping pills daily should not stop suddenly without medical advice, because withdrawal can cause seizures. Tell your clinician or pharmacist what you use so they can decide on a safe plan.

If you are supporting someone

Ask open questions, listen without hurrying to fix things, and offer specific invitations rather than "let me know if you need anything." Notice changes over time. Our articles on major depressive disorder and on caregiver stress may help you understand what you are seeing.

Talking with a clinician

Your clinician may ask about mood, sleep, memory, alcohol, medicines, hearing, vision and daily activities. They combine your history, an examination and sometimes screening questionnaires or lab tests to look for contributing causes such as depression, thyroid problems, vitamin deficiency or medicine effects. Bringing a family member or a written list of concerns can help.

When loneliness becomes a safety concern

Thoughts of suicide in older adults deserve prompt attention. If someone is thinking about ending their life, has a plan or the means, or has already acted on a thought, call 911 first and stay with the person, removing means only if it is safe to do so. If the thoughts are present but there is no immediate intent, the 988 Suicide and Crisis Lifeline (call or text 988) offers support at any hour, and a same-day call to a clinician is appropriate.

When to Seek Medical Care