Understanding the Relationship Between Anxiety & Depression

Key Takeaways

• Anxiety and depression are separate diagnoses that frequently occur in the same person, sharing inherited risk, stress system changes, and life circumstances that trigger both at once.
• Broken sleep, poor concentration, fatigue, irritability, appetite change, and social withdrawal appear in both conditions, which is why a second diagnosis is often missed during screening.
• Anxiety more often arrives first, frequently in childhood or adolescence, with depression following after months or years of worry, disrupted sleep, and avoidance that strip away energy and enjoyment. 
• Loss of interest (anhedonia) most reliably separates the two in clinical assessment, since anxiety tends to raise arousal and point to future threat while depression often lowers it and points to loss. 
• At A Mission For Michael, we treat co-occurring anxiety and depression in a single plan with a 2:1 staff-to-client ratio, matching outpatient, intensive outpatient, partial hospitalization, or residential care to how much daily functioning remains. 

Are Anxiety & Depression Connected?

Anxiety and depression are closely connected. In one large Dutch study, 67% of people with a depressive disorder also had a current anxiety disorder, and 63% of people with an anxiety disorder also had current depression. Most people describe only the symptoms that bother them most, such as constant worry or low mood, so the second condition can go unnamed for years. A diagnosis that captures only half the picture shapes every treatment decision that follows. 

That gap shows up in recovery. When you treat only one condition, the untreated one keeps feeding the other, which is why progress often stalls. If you have been through treatment before and it didn’t hold, this may be part of the reason, and it doesn’t mean you failed. Co-occurring cases also tend to be more severe and last longer, so the order in which symptoms appeared and how well daily life is holding together both affect the right level of care. 

At A Mission For Michael, we screen for both conditions at the first assessment so neither one goes unnamed. 

What Do Anxiety & Depression Have in Common?

Both conditions share many of the same physical and cognitive symptoms. Broken sleep, poor concentration, fatigue, irritability, appetite change, and social withdrawal occur in anxiety disorders and in depression. Clark and Watson’s tripartite model describes this common layer as general distress, the tension and unhappiness both conditions generate beneath the features specific to each diagnosis. 

This overlap makes self-report less reliable and can cause clinicians to miss the second diagnosis during screening. A person presenting with constant worry may be assessed thoroughly for anxiety and never asked about loss of interest. The reverse also happens. 

Behavior overlaps as well. Anxiety produces avoidance of situations that feel threatening. Depression produces withdrawal because activity no longer registers as worth the effort. Both yield the same observable pattern of canceled plans, reduced contact, and time spent alone.

Why the Two Conditions Can Develop Together

Shared Genetic & Temperamental Risk

Much of the inherited risk for anxiety disorders overlaps with the inherited risk for depression. Much of that shared inheritance runs through a general tendency toward negative emotion, described clinically as neuroticism or negative affectivity. 

People high in that trait tend to react more strongly to setbacks, return to baseline more slowly, and carry elevated risk for either condition across the lifespan. 

A Stress Response That Stays Activated

Both conditions involve a stress system that fails to reset. Prolonged activation keeps stress hormones elevated, fragments sleep, and reduces the brain’s capacity to regulate mood.

Long-running anxiety can keep this stress response switched on. Over months, that strain can wear down motivation and reward processing, making a depressive episode more likely. Because the two conditions share these mechanisms, skills-based therapies such as CBT can reduce symptoms of both at once. 

Circumstances That Feed Both

Sustained work pressure, bereavement, isolation, financial strain, chronic illness, and unresolved trauma raise the risk of anxiety and depression at the same time, so one stressor can set both in motion. 

A person recovering from a traumatic event may develop hypervigilance and panic first, then flat mood and hopelessness as the consequences of the event accumulate.

Which Condition Usually Comes First

Anxiety more often arrives first, frequently during adolescence or early adulthood, with depression developing later. Sustained worry consumes energy, disrupts sleep, and pushes people away from the situations that supply enjoyment and a sense of competence. Removing those inputs over months or years raises the probability of a depressive episode.

The relationship can also work the other way around. Depression narrows a person’s sense of what is possible, and that narrowing generates worry about work performance, physical health, and the reactions of people who have noticed the change. 

Once both conditions are present, they reinforce each other. Worry disrupts sleep. Poor sleep deepens low mood. Low mood removes the energy required to face avoided situations. Continued avoidance strengthens the original fear.

How Anxiety & Depression Differ

Time Orientation

Anxiety points toward a threat that has not occurred, and produces anticipation, muscle tension, and hyperarousal. Depression points backward and inward, toward loss and failure, and produces the expectation that nothing ahead will feel different.

Arousal Levels

Anxiety raises arousal, keeping the body activated and attention narrowed onto the anticipated threat. Depression often lowers it, producing slowed movement and speech, physical heaviness, and reduced responsiveness. 

Loss of Pleasure

Anxiety usually leaves the capacity for enjoyment largely intact, since people still want what they want and fear an obstacle standing between them and it. Depression removes the wanting itself, and that loss of interest, termed anhedonia, is the feature that most reliably separates the two conditions in clinical assessment. 

How Are Anxiety & Depression Treated Together?

Therapies That Address Both Conditions

Because the two conditions share mechanisms, a single therapy can often reduce symptoms of both. 

• Cognitive Behavioral Therapy (CBT) targets the thinking patterns behind catastrophic worry and hopeless self-evaluation alike. 
• Dialectical Behavior Therapy (DBT) builds distress tolerance and emotional regulation skills that apply to panic and to despair. 
• Eye Movement Desensitization and Reprocessing (EMDR) addresses the traumatic memory underlying both symptom sets. 
• Acceptance and Commitment Therapy (ACT) helps you make room for difficult thoughts and feelings and move toward what matters, which counters both avoidance and withdrawal. 

At AMFM, we pair these with holistic options including equine therapy, art therapy, and yoga. Our psychiatric team is available if medication support becomes part of your plan, but therapy leads the work. 

Choosing a Level of Care

Because co-occurring anxiety and depression tend to be more severe and persistent than either condition alone, we address both inside a single plan. 

At AMFM, we set the intensity of support by how much daily functioning remains. Someone still holding down work and a sleep routine may do well in our outpatient program, available in person or virtually. 

When functioning at home or at work has stopped, or an outpatient course has brought no relief, our clinical team assesses whether residential treatment, a partial hospitalization program, or an intensive outpatient program is a better fit. 

If you are a clinician referring a patient, our admissions team can schedule an assessment quickly and recommend the right level of care. 

Anxiety & Depression: Similarities & Differences

Feature	Anxiety	Depression
Emotional Focus	Anticipated threat	Loss and failure
Arousal	Raised: tension, restlessness, racing heart	Lowered: fatigue, heaviness, slowed movement
Enjoyment	Largely preserved	Reduced or absent (anhedonia)
Typical Onset	Childhood or adolescence	Adolescence to mid-adulthood, often after a period of anxiety
Shared Symptoms	Broken sleep, poor concentration, fatigue, irritability, appetite change, withdrawal	Same as anxiety
Shared Treatments	CBT, DBT, ACT, EMDR, psychiatric care	Same as anxiety

Get Care for Both Anxiety & Depression at A Mission For Michael

Anxiety and depression share too much ground to be handled as separate problems. The overlap in symptoms hides one diagnosis behind the other, and the shared biology means each condition keeps the other running. Recovery works best when both are assessed and addressed within the same treatment plan.

At A Mission For Michael, our licensed clinicians combine CBT, DBT, and EMDR with psychiatric care and holistic options like equine and art therapy. We plan aftercare from the day you arrive, so support continues as you step down to less intensive care. Contact our admissions team at 866-478-4383 or verify your insurance to arrange an assessment and begin treatment.

Frequently Asked Questions (FAQs)

Is there a single diagnosis for having both anxiety and depression?

Diagnostic systems handle this differently. The DSM-5-TR records two separate diagnoses, or adds a “with anxious distress” specifier to a depressive episode. The ICD-11 includes mixed depressive and anxiety disorder, classified as a depressive disorder, for presentations where symptoms of each are present but neither alone meets full diagnostic criteria. 

Can a physical health condition produce anxiety and depression symptoms?

Yes. Thyroid problems (both underactive and overactive), sleep apnea, anemia, vitamin B12 deficiency, and certain prescribed medications can cause fatigue, low mood, poor concentration, and physical agitation. Chronic pain can also contribute to or worsen these symptoms. A thorough assessment may include a medical history and bloodwork, such as thyroid, blood count, and B12 tests, to rule out these causes before a mental health diagnosis is confirmed. 

How long does treatment take when both conditions are present?

Often longer. Research shows people with both conditions typically take longer to reach remission. Anxiety symptoms may ease earlier with skills-based work, while low interest and energy can take longer to lift. Clinicians track progress against both symptom sets at regular intervals. 

Can lifestyle changes alone resolve co-occurring anxiety and depression?

Regular sleep timing, physical activity, morning light exposure, and scheduled contact with other people improve both conditions and support clinical treatment. They rarely resolve moderate to severe co-occurring cases on their own, since low energy and avoidance make the changes hardest to sustain precisely when they are most needed.

How does A Mission For Michael reduce the risk of symptoms returning after treatment?

At A Mission For Michael, aftercare planning begins at admission, not at discharge. A case manager submits a formal aftercare request within your first week, and an eight-week Continued Care Journey curriculum runs during your stay to prepare you for life after treatment, including step-down options such as PHP, IOP, and outpatient care.