Anxiety vs. Depression: Differences, Overlapping Symptoms, and How to Get Help

Anxiety and depression are two of the most common mental health conditions in the United States, and they can be confused with one another. While they are distinct diagnoses with their own defining features, they share enough overlapping symptoms. Moreover, anxiety and depression frequently co-occur.

According to the Anxiety and Depression Association of America, nearly half of all people diagnosed with depression also have an anxiety disorder. Understanding the differences and the connections between these two conditions can help you identify what you're experiencing and seek the right kind of help.

Key Takeaways

• Anxiety is primarily characterized by persistent worry, fear, and physical tension; depression by persistent sadness, hopelessness, and loss of interest. Both can cause fatigue, sleep problems, and difficulty concentrating.

• Anxiety and depression commonly occur together, as having one significantly raises the risk of developing the other, and many people experience both simultaneously.

• Both conditions are treatable with therapy, medication, or a combination of both. Comorbid anxiety and depression may present more severe symptoms and require longer treatment duration. Getting an accurate diagnosis from a psychiatric provider is the key to finding the right treatment plan.

What is Anxiety?

Anxiety disorders are a group of conditions that involve excessive, persistent fear, worry, or anxiety that is difficult to control and interferes with daily life. The most common type is generalized anxiety disorder (GAD), but anxiety also includes panic disorder, social anxiety disorder, obsessive-compulsive disorder, post-traumatic stress disorder (PTSD), and specific phobias. According to the National Institute of Mental Health, anxiety disorders affect about 19% of U.S. adults each year.

Core Features of Anxiety

Anxiety tends to be future-oriented. People with anxiety often experience anticipatory fear — worrying about things that might go wrong, imagining worst-case scenarios, or feeling that something bad is about to happen even when the level of fear is disproportionate to the situation. Key features include:

• Persistent, excessive worry that is hard to control

• Overthinking

• Physical symptoms: racing heart, dizziness, shortness of breath, muscle tension, chest tightness, sweating, headaches 

• Restlessness or feeling on edge

• Difficulty relaxing or quieting the mind

• Avoidance of situations that trigger fear or worry

• Sleep problems, particularly difficulty falling asleep due to racing thoughts

What is Depression?

Major depressive disorder (MDD) is characterized by persistent low mood, loss of interest in activities, and a range of physical and cognitive symptoms that significantly impair a person's ability to function. Based on 2019 data from the World Health Organization, depression affects more than 280 million people worldwide, making it one of the leading causes of disability globally.

According to the Substance Abuse and Mental Health Services Administration (SAMHSA), 7.1% of adults and 13.3% of adolescents in the U.S. were diagnosed with major depression in 2017.

Core Features of Depression

Depression tends to be past- and present-oriented. Rather than worrying about what might happen, people with depression may feel persistently discouraged, emotionally numb, or hopeless about improvement. Key features include:

• Persistent sadness, emptiness, or hopelessness lasting most of the day, nearly every day

• Loss of interest or pleasure in activities that once felt enjoyable (anhedonia)

• Low energy and fatigue, even with adequate rest

• Changes in appetite or weight, often decreased appetite, though some experience increased eating

• Too much sleep or too little sleep

• Slowed thinking, movement, or speech; difficulty remembering things

• Feelings of worthlessness or excessive guilt

• Thoughts of death or suicide

How Anxiety and Depression Overlap

Despite their differences, anxiety and depression share several symptoms that can make it hard to tell them apart, particularly when both are present at once. Both conditions can cause:

• Difficulty concentrating or making decisions

• Sleep disturbances (though anxiety more often causes difficulty falling asleep, while depression may either cause sleeping too much or too little)

• Fatigue and low energy

• Social withdrawal and isolation

• Irritability

This overlap occurs due to possible shared origins, including common neurobiological or genetic risk factors, early exposure to trauma, parenting style, or chronic stress that can either cause depression or anxiety, or both. In fact, childhood trauma, chronic tendency to experience negative emotions (neuroticism), and early age of onset are considered risk factors for comorbidity of depressive and anxiety disorders.

 This comorbidity can sometimes make diagnosis and treatment more complex. A person presenting with fatigue, concentration problems, and social withdrawal could be experiencing either condition or both.

Anxiety and Depression: Are They Connected?

Research consistently shows that the two conditions are closely linked. Studies published in 2015 showed that around 41.6% of individuals with MDD had one or more anxiety disorders during the same 12-month period. The pattern remained true the other way round: 46% of people with GAD and 50-65% of people with panic disorder had co-occurring MDD.

More recently, a large 2021 study published in the Journal of Affective Disorders involving nearly 3,000 people found that among participants with either depression and/or anxiety, comorbidity was the rule rather than the exception. A large majority (68%) of people with depression had a current anxiety disorder, while 63% of people with an anxiety disorder had comorbid depressive disorder.

Moreover, a study of the timelines of occurrences revealed that anxiety disorders tend to precede depressive disorders in 57% of comorbid cases; whereas only 18% of comorbid cases had depression occurring first. This could be because persistent anxiety symptoms contribute to emotional exhaustion, impaired functioning, and increased risk of depressive symptoms over time.

Another closely related presentation seen in clinical practice in some people is anxious depression or depression with anxious distress features. Anxious depression is different from co-occurring anxiety and depression and is associated with more severe symptoms, requiring more careful attention to medication selection and therapy approach. Key Differences at a Glance

While there is substantial overlap, a few distinguishing features can help clarify which condition is dominant:

• Emotional direction: Anxiety is often associated with fear about future events; depression more commonly involves hopelessness, low motivation, and diminished pleasure.

• Motivation: People with anxiety often want to do things but feel too afraid or overwhelmed; people with depression often lose the desire to do things entirely.

• Physical arousal: Anxiety more commonly involves heightened physiological arousal — racing heart, tension, hypervigilance; depression may involve a slowing down of thought, low energy, and reduced motivation.

• Relationship to pleasure: Anhedonia, the inability to feel pleasure, is a hallmark of depression and is not typically a feature of anxiety alone.

How Are They Treated?

Both anxiety and depression are treatable conditions. Most people see meaningful improvement with the right combination of interventions. That said, co-occurring anxiety and depression may involve more severe symptoms and impairment, making treatment more challenging and possibly of a longer duration.

Therapy

Cognitive-behavioral therapy (CBT) is the most evidence-based form of psychotherapy for both conditions. For anxiety, CBT typically focuses on identifying and challenging anxious thought patterns and reducing avoidance behaviors. For depression, it targets negative self-beliefs, behavioral withdrawal, and hopelessness. A meta-analysis published in Psychological Medicine found CBT effective across a wide range of anxiety and depressive disorders.

Medication

Many of the same medications are used for both conditions, which reflects the biological overlap between them. SSRIs (selective serotonin reuptake inhibitors), such as sertraline (Zoloft), escitalopram (Lexapro), and fluoxetine (Prozac), are first-line treatments for both anxiety and depression. SNRIs (serotonin-norepinephrine reuptake inhibitors) are also effective for both, particularly for anxiety. According to the National Institute of Mental Health, these medications typically take 4 to 8 weeks to reach their full effect.

Lifestyle and Supportive Care

Regular physical activity, consistent sleep, stress reduction practices, and social connection are all associated with improvement in symptoms of both anxiety and depression and overall well-being. These are most effective as complements to — not replacements for — professional treatment.

When to Seek Help

You should consider speaking with a mental health professional if you:

• Feel sad, anxious, or empty most of the time for two weeks or more

• Have lost interest in things you used to enjoy

• Feel excessive worry or fear that is difficult to control

• Have trouble sleeping, concentrating, or functioning at work or home

• Have thoughts of hopelessness, self-harm, or suicide

Blossom Health offers virtual psychiatric care for people struggling with co-occurring anxiety and depression, including treatment-resistant depression. Through secure online consultations, licensed psychiatric providers can help evaluate symptoms, prescribe and manage medications when appropriate, and create personalized treatment plans, all from the comfort of home.

If you are having thoughts of suicide or self-harm, please call or text 988 to reach the Suicide and Crisis Lifeline, available 24/7.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. If you are experiencing a mental health crisis, contact the 988 Suicide and Crisis Lifeline by calling or texting 988.

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