You Might Have Anxiety. You Might Also Have Depression. Here Is How Treatment Works When Both Show Up.
What comorbid mental health conditions are, why they are so common in college students, and how therapy works when more than one condition is present.
You have been reading about anxiety and a lot of it fits. You have also been reading about depression and a lot of that fits too. Or maybe you have an ADHD diagnosis and have also been noticing what sounds like significant anxiety. Or you have OCD and depression at the same time in a way that makes neither fully comprehensible on its own. And you are wondering whether it is possible to have more than one thing going on at the same time, or whether something is being missed, or whether the overlap means the diagnosis is wrong.
Having more than one mental health condition simultaneously is called comorbidity, and it is the norm rather than the exception in college students. Understanding why this is so common, what it looks like in practice, and how treatment works when more than one condition is present changes both how you understand your experience and what to expect from getting help.
At Semester Health, most college students who come in dealing with one identified condition are found on assessment to have more than one thing going on. That is not alarming. It is the accurate picture, and it leads to more effective treatment than a single-condition framework would.
How Common Is Comorbidity in College Students?
Very common. The ACHA Fall 2024 national survey of over 33,000 undergraduate students found that 23% of college students reported experiencing both depression and anxiety, not one or the other. Research on OCD consistently finds that over 80% of people with OCD also meet criteria for another condition, most commonly major depressive disorder or another anxiety disorder. ADHD is associated with anxiety in roughly 50% of people who have it, and with depression in roughly 30%.
Comorbidity is common for several neurobiological and psychological reasons. Many mental health conditions share underlying mechanisms, particularly around the regulation of serotonin, dopamine, and the stress response system. Conditions also compound each other: untreated anxiety, for example, is a significant risk factor for developing depression over time, and chronic ADHD-related failure and self-blame create conditions that make depression more likely. The longer any one condition goes unaddressed, the more likely it is that additional conditions will develop alongside it.
Common Comorbid Patterns in College Students
Anxiety and depression
The most common pairing. They share enough neurobiological infrastructure that the same stressors, the same sleep disruption, and the same sustained high cortisol that drive one also drive the other. They look different on the surface, anxiety involves activation and future-oriented worry, depression involves deactivation and present-state flatness, but they interact in specific ways. Anxiety often presents first and depression develops as the anxiety becomes unmanageable over time.
ADHD and anxiety
Roughly half of people with ADHD also experience significant anxiety. The causal direction often runs from ADHD to anxiety: chronic organizational difficulty, missed deadlines, the accumulated self-blame of years managing a condition that the environment was not built for, all create fertile conditions for anxiety to develop. The anxiety and the ADHD can also interact in ways that make both harder to treat independently: the anxiety drives avoidance of tasks, and the ADHD makes the tasks feel impossible, and the combination produces paralysis.
OCD and depression
OCD is exhausting. The mental labor of managing intrusive thoughts and compulsions across the day depletes resources in ways that produce depression as a secondary condition for many people with untreated OCD. The shame and isolation associated with OCD, particularly in forms involving intrusive thoughts with disturbing content, also directly contribute to depressive symptoms. Depression and OCD also interact: low mood reduces the tolerance for obsessive distress, which makes compulsions feel more necessary, which can worsen the OCD cycle.
Trauma and other conditions
Trauma and PTSD are associated with elevated rates of depression, anxiety, substance use, and eating disorders. This is because trauma affects the fundamental regulatory systems of the nervous system, creating vulnerability across multiple domains rather than one specific condition. Students with unprocessed trauma may present with what looks like generalized anxiety or depression without a full picture emerging until the trauma is identified and addressed.
How Treatment Works With Multiple Conditions
The good news about comorbidity is that effective treatment for one condition often produces improvement in the other. Treating anxiety reduces the activation and avoidance that contribute to depression. Treating depression improves the energy and motivation that make managing anxiety easier. Treating ADHD effectively often reduces anxiety by reducing the organizational chaos that was generating it. The conditions interact, and successful treatment of any one tends to have positive effects across the picture.
A skilled therapist assesses the full picture rather than treating a single presenting condition in isolation. Understanding how conditions interact, which ones are primary and which are secondary, and which to address first for maximum downstream benefit, is clinical work that requires someone who can hold the complexity of the whole picture.
CBT has robust evidence for treating anxiety, depression, OCD, and trauma-related conditions both separately and in comorbid presentations. Specific adaptations exist for the most common pairings. A therapist who can hold the complexity of your specific combination is more valuable than one who treats each condition as if it exists independently.
If you are navigating what sounds like more than one thing at the same time and are not sure how to make sense of it or what to do about it, Semester Health offers comprehensive assessment and therapy for college students with complex mental health presentations.
Frequently Asked Questions
Is it possible to have both anxiety and depression?
Yes. Research shows that 23% of college students experience both. They are the most commonly co-occurring mental health conditions and are often driven by shared neurobiological mechanisms.
Does having multiple conditions make treatment harder?
More complex, but not necessarily harder or less effective. Skilled therapists work with comorbid presentations regularly and develop treatment plans that account for how conditions interact. Effective treatment of one often produces improvements across the picture.
How does a therapist know which condition to treat first?
Generally by identifying which condition is primary, which is most impairing, and which treatment will produce the most beneficial downstream effects. Sometimes it means treating the most acute condition first and then addressing others as stability improves.
Can I be misdiagnosed if I have multiple conditions?
Yes, particularly if only one condition is assessed. ADHD is frequently misdiagnosed as anxiety or depression. Trauma is frequently missed when depression or anxiety is the primary presenting concern. Comprehensive assessment that looks at the full picture is more likely to produce accurate understanding.
Will medication help if I have multiple conditions?
Potentially, and the specific medication or combination depends on the conditions present and their relative severity. This is a conversation for a prescriber who understands the full picture. Some medications address multiple conditions simultaneously.
How do I explain to a therapist that I think I have more than one thing going on?
Just say that. Something like I have been noticing symptoms that seem to fit both anxiety and depression and I am not sure which is more primary is a completely appropriate opening. A good therapist will assess comprehensively rather than taking the first presenting concern at face value.
