Depression and loneliness

Feeling alone and feeling depressed can look a lot alike. Both can make you tired, flat and quiet. Both can make the world feel far away. And each one can make the other worse.

The good news: depression is common and treatable. It is not a flaw in your character, and it is not your fault. Many people who feel this way now will feel better later, especially with support.

How loneliness and depression feed each other

Loneliness and depression often travel together, and they can pull on each other like a loop.

• Loneliness can raise the risk of depression. In one large UK study that followed adults for about 12 years, people who said they felt lonely were at about 77% higherHigher risk of a new depression diagnosis among adults who said they felt lonely (UK Biobank, Wan et al., 2025)As of July 8, 2025.339,051 UK adults followed for about 12 years. A hazard ratio of 1.77 after adjusting for other factors. This shows a link, not proof that loneliness causes depression.Source: Wan et al. (2025), General Hospital Psychiatry: Association between loneliness, social isolation and incident depression (PubMed) risk of a later depression diagnosis than people who didn't. That is a link, not proof of cause, but it fits many other studies.
• Depression can make you pull away. It drains energy and makes people seem tiring or hard to reach. You may cancel plans, stop answering messages, or feel you have nothing to offer.
• Pulling away deepens loneliness. Fewer contacts mean fewer good moments with others, which can feed low mood.

You don't have to fix everything at once to break this loop. Small steps on either side help. You can read more in The loneliness trap.

How common it is

You are far from the only one. In the U.S., about 8.3%U.S. adults who had at least one major depressive episode in the past year (2021)As of December 31, 2021.About 21 million adults.Source: National Institute of Mental Health: Major Depression statistics (from SAMHSA's 2021 National Survey on Drug Use and Health) of adults had a major depressive episode in one year. Among teens aged 12 to 17, it was 20.1%U.S. teens aged 12 to 17 who had at least one major depressive episode in the past year (2021)As of December 31, 2021.About 1 in 5 teens, or 5 million young people.Source: National Institute of Mental Health: Major Depression statistics (from SAMHSA's 2021 National Survey on Drug Use and Health).

Signs of depression

Everyone has sad days. Depression is different: it lasts most of the day, nearly every day, for two weeks or more. Common signs include:

• Feeling sad, empty, numb or hopeless
• Losing interest or pleasure in things you used to enjoy
• Sleeping much more or much less than usual
• Eating much more or much less, or weight changes
• Feeling tired or slowed down, even after rest
• Trouble focusing, remembering or deciding
• Feeling worthless or very guilty
• Feeling irritable or restless (this is common in teens and in many men)
• Aches, pains or stomach problems with no clear cause
• Thoughts of death or suicide

This list can't tell you whether you have depression. Only a doctor or mental health professional can do that. But if several of these fit you, it is worth talking to one.

What helps

Research suggests several things help, often best in combination.

Treatment

• Talk therapy. Cognitive behavioral therapy (CBT), interpersonal therapy and other approaches have good evidence. Interpersonal therapy focuses on your relationships, which can be a good fit when loneliness is part of the picture.
• Medicine. Antidepressants help many people. Whether to start, stop or change any medicine is a decision for you and your doctor or pharmacist.
• Both together work well for many people with moderate or severe depression.

See Getting help for how to find free and low-cost care.

Things you can try now

These do not replace treatment, but they can lift mood a little and break the loop.

• Move your body. A large 2024 review found that walking or jogging, yoga and strength training all helped depression. Even a 10-minute walk counts. See Sleep, food and movement.
• Keep a simple routine. Get up and go to bed at about the same time. Eat something at regular times.
• Do one small thing you used to like, even if you don't feel like it. With depression, action often comes before motivation, not after.
• Get daylight, ideally in the morning.
• Reach out in a small way. One text. One short call. Sitting in a library or café near other people. See Small first steps.
• Go easy on alcohol and drugs. They can make depression worse. See Alcohol, drugs and loneliness.
• Be kind to yourself. Talk to yourself the way you would talk to a friend who feels this way.

When to see a doctor

See a doctor, nurse or counselor if:

• Low mood or loss of interest has lasted two weeks or more
• It is getting in the way of work, school, sleep, eating or relationships
• You are drinking or using drugs to cope
• You have had depression before and it seems to be coming back

A primary care doctor is often the easiest first step. They can check for physical causes, such as thyroid problems or side effects from medicines, and refer you on.

At the visit, you might say: "I've been feeling down most days for about [how long]. I've lost interest in things, I'm not sleeping well, and I feel very alone. I'd like help."

If you want someone to talk to, not a crisis line

Sometimes you are not in danger but you need a kind voice. Warmlines and friendship lines are made for that. See Someone to talk to.

In the U.S., the NAMI HelpLine (1-800-950-6264, or text "helpline" to 62640) gives free information and support on weekdays, 10 a.m. to 10 p.m. Eastern. It is not a crisis line.

If someone you love seems depressed

Reach out, listen, and don't try to argue them out of it. Offer to help them find care. If they talk about suicide, take it seriously and help them contact 988 or emergency help. See When someone you know is lonely.