Obsessive-Compulsive Disorder vs Major Depressive Disorder

Written & Medically Reviewed By

Dr. Amar Shinde

Published on: 11 Jul 2026

Two people can sit in the same psychiatrist's waiting room, both struggling, both exhausted, and yet be dealing with completely different conditions. Another person may feel sad most of the time, lose interest in things they once enjoyed and find it difficult to get through the day.

The first person may have obsessive-compulsive disorder (OCD), while the second may have major depressive disorder (MDD). Some people can also have both conditions at the same time.

Although OCD and MDD are different mental health conditions, they are often confused because some of their symptoms can overlap. However, each condition needs a different treatment approach. That's why getting the right diagnosis is so important. It helps doctors understand what a person is experiencing and choose the most suitable treatment.

In this article, we'll look at the differences between OCD and MDD, their symptoms, causes, treatment options and what happens when someone has both conditions together.

What is Obsessive-Compulsive Disorder (OCD)?

Obsessive-compulsive disorder is a mental health condition. It is built around two connected experiences, which are obsessions and compulsions.

Obsessions are basically unwanted thoughts, images or urges that keep coming back. And even if a person tries to ignore them, they can sometimes be difficult to control.

Compulsions are repeated actions or mental rituals that a person does to reduce the anxiety caused by these thoughts.

Some common obsessions include:

• An intense need for order or symmetry
• Unwanted thoughts related to religion, sex or even violence
• Fear of harming themselves or someone else

Some common compulsions include:

• Repeatedly washing hands or excessive cleaning
• Repeatedly checking locks, doors, electrical appliances and other things
• Arranging or re-organising things until they feel is "quite right"
• Counting, tapping or repeating words in the mind

Many people think OCD is just about being neat or liking things organised. However, this isn't true. OCD is a mental health condition characterised by obsessions and compulsions. Although anxiety is a common feature of OCD, it is classified as an Obsessive-Compulsive and Related Disorder (OCRD) rather than an anxiety disorder in the DSM-5. Most people with OCD recognise that their thoughts or rituals do not make sense, yet the urge to perform them can feel impossible to resist because of the distress involved/logical . 

A psychiatrist diagnoses OCD after carrying out a detailed mental health assessment with the help of the DSM-5 diagnostic criteria. [1]

What is Major Depressive Disorder (MDD)?

Major depressive disorder (MDD) is far more than feeling sad after a difficult experience. It is basically a mental health condition that can affect someone's emotions, thoughts and daily functioning. These symptoms can last for at least two weeks and can continue for several months without treatment.

The symptoms of MDD can affect different areas of a person's life and are generally grouped into emotional, physical, and cognitive symptoms:

Emotional symptoms are:

• Persistent low mood or emptiness
• No longer able to enjoy hobbies or activities that you once looked forward to
• Feelings of worthlessness or excessive guilt
• Getting irritated or frustrated more easily

Physical symptoms are:

• Feeling tired almost every day
• Sleeping too much or too little
• Changes in appetite or weight
• Body aches or pains without any clear reason

Cognitive symptoms are:

• Finding it difficult to focus or concentrate
• Slowed thinking
• Difficulty making decisions

MDD can affect a person's work and relationships. Even simple tasks like getting out of bed or doing everyday chores can feel difficult. Like OCD, major depressive disorder is diagnosed through a comprehensive psychiatric assessment using the DSM-5 diagnostic criteria. [1] [2]

OCD vs MDD: The Core Differences at a Glance

Although OCD and MDD can sometimes look similar, they are different conditions. People with OCD usually struggle with thoughts that are unwanted and that make them feel anxious, so they repeat certain behaviours to feel better. MDD is a disorder of mood and motivation. One pushes a person into frantic activity just to feel safe. The other pulls them into stillness because nothing feels worth doing.

Causes and Risk Factors: Shared and Separate

OCD and MDD are different mental health conditions, but they share some of the same risk factors. This is one reason why some people experience both conditions.

Risk factors that both conditions share:

• Genetics and family history of mental illness
• Changes in serotonin levels in the brain
• Long-term stress
• Childhood trauma or difficult life experiences

Risk factors more common in MDD:

• Major life events such as losing a loved one, divorce or losing a job
• Social isolation or limited support from family and friends
• Hormonal changes
• Long-term physical health problems

Risk factors more common in OCD:

• A family history of OCD or tic disorders
• Differences in certain parts of the brain that control thoughts and behaviour
• In rare paediatric cases, onset following streptococcal infection

It is important to understand that OCD and MDD are not caused by personal weakness or bad parenting or a person's character. There are different factors. They can be biological, psychological and environmental, and can contribute to these conditions. [2] [4]

Can OCD and Major Depressive Disorder Occur Together?

Yes. In fact, it is more common than many people expect.

Psychiatric comorbidities are common in people with OCD. Research suggests that around seven in ten people with OCD have at least one co-occurring psychiatric condition, with mood disorders being particularly common in adults. Living with OCD over a long period can also increase emotional distress and may contribute to the development of depression in some people. [3]

This usually happens because living with OCD for a long time can be very stressful. Many people spend hours every day dealing with unwanted thoughts and compulsive behaviours. Over time, this can affect their mental health.

• Hours lost on everyday basis to rituals and intrusive thoughts
• Feeling mentally and physically tired just because of constant anxiety
• Shame and secrecy, because  many people hide their symptoms for several years
• Facing problems in relationships, work or  in their daily life

After dealing with these problems for months or even years, some people may also develop depression.

Treating both conditions together can also be more complicated. For example, for a person with severe depression, it can be difficult to take part in Exposure and Response Prevention (ERP), as the therapy requires active participation and regular practice.

This is why doctors carefully check for both OCD and MDD at the time of diagnosis. Identification of both conditions can help them in creating the right treatment plan. [3]

Diagnosis and Clinical Evaluation

There is no blood test or brain scan that can diagnose OCD or even major depressive disorder (MDD). Doctors diagnose these conditions after carrying out a detailed mental health assessment like:

• Asking about medical history and other symptoms
• Getting a deep understanding of how the symptoms affect a person’s daily life
• Conducting a clinical interview
• Psychological assessment tools, including the Y-BOCS for OCD severity and standardised depression rating scales
• Using the DSM-5 diagnostic criteria just to diagnose each condition [1]

Doctors also try to understand if a person's low mood is caused by MDD or has developed because of untreated OCD. Although the symptoms may seem similar, the treatment can be different. This is why self-diagnosing through online quizzes or checklists is not a good idea.

Recognising the Symptoms: A Side-by-Side View

Symptoms of OCD:

• Unwanted thoughts that keep coming back
• Spending hours on daily basis in dealing with obsessions or compulsions
• Distress when rituals are interrupted
• Repeating certain actions for reducing anxiety
• Knowing the behaviour doesn't make sense but also finding it hard to stop

Symptoms of Major Depressive Disorder:

• Feeling sad or low all the time
• Losing interest in several things/hobbies 
• Difficulty concentrating, thinking clearly, or making decisions
• Feelings of worthlessness
• Sleeping too much or too little
• Recurring thoughts of death or suicide

OCD and MDD can sometimes have similar symptoms but they are different conditions. OCD is largely driven by intrusive thoughts and anxiety, which leads to compulsive behaviours. People with MDD often feel sad. They even lose interest in daily activities and have very little energy or motivation. When a person has both conditions at the same time, the symptoms can become more severe and can also make daily life even more difficult.

When Should You Seek Professional Help?

You should speak to a mental health professional if you notice any of these signs like:

• Feeling sad or low for more than two weeks
• Having thoughts that are unwanted that are difficult to control
• A noticeable decline in work, studies, or even in relationships
• Spending more than an hour a day on rituals or checking behaviours
• Withdrawing from family, friends, or activities that were once enjoyable
• Having thoughts of self-harm or suicide

If you have thoughts of harming yourself or ending your life, seek professional help immediately. Don't wait for the symptoms to improve on their own.

In general, if your symptoms are affecting your daily life, it's a good idea to get a professional assessment. Online quizzes and self-diagnosis cannot separate OCD from MDD, or help in identifying when both of the conditions are present. That requires a comprehensive assessment by a psychiatrist.

Treatment Options for OCD and MDD

The treatment for OCD and MDD depends on the person's symptoms and how severe the condition is. Doctors can recommend therapy, medication or even a combination of both.

Treating OCD:

• Exposure and Response Prevention (ERP): This is one of the most effective therapies for OCD. It helps people slowly face situations that trigger their anxiety without performing compulsive behaviours. Over time, this can help reduce anxiety and compulsions.
• Cognitive Behavioural Therapy (CBT): This therapy helps people recognise and change negative thought patterns linked to OCD.
• Medications: Doctors may prescribe SSRIs, a type of antidepressant that can help reduce OCD symptoms. People with OCD may require higher doses of SSRIs than those typically used for depression, depending on their symptoms and clinical response. [4]

Treating MDD:

Treatment for MDD may include:

• Cognitive Behavioural Therapy (CBT): It helps people identify and change negative thoughts that contribute to depression.
• Antidepressant medications: Doctors often prescribe SSRIs to help improve mood and reduce symptoms.
• Family support: Support from loved ones can make it easier for a person to continue treatment and recover over time.
• Healthy lifestyle changes: Getting enough sleep, exercising regularly and staying connected with family and friends can support recovery.

When OCD and MDD occur together, treatment needs to be carefully planned. In some cases, doctors may first treat depression so the person feels better and is able to take part in Exposure and Response Prevention (ERP). Every person is different, so doctors create a treatment plan based on their individual needs. [3] [4]

How Jagruti Supports Individuals with OCD and MDD

At Jagruti, treatment begins with a detailed psychiatric evaluation. Getting the right diagnosis is important because both conditions need the right treatment.

Our approach includes:

• Individualised treatment plans built around each person's specific diagnosis and history
• A team of experienced psychiatrists, psychologists and therapists
• Evidence-based therapies including CBT, ERP, and structured counselling
• Medication management where clinically appropriate 
• Aftercare support that continues well beyond discharge
• Family counselling and education throughout the recovery process
• A holistic approach that focuses on healthy routines, nutrition, exercise and emotional wellbeing

When someone has both OCD and MDD, our team treats both conditions together. This helps manage all the symptoms and gives the person a better chance of long-term recovery.

If you or a loved one is showing signs of OCD, depression, or both, our team at Jagruti Mental Hospital in Gurgaon can help with a comprehensive psychiatric evaluation and personalised treatment plan.

Conclusion

Obsessive-compulsive disorder and major depressive disorder are separate mental health conditions but they can also occur together and can sometimes be mistaken for one another. OCD mainly causes unwanted thoughts and repeated behaviours. On the other hand, MDD makes a person feel sad, lose interest in daily activities and have low energy. When someone has these conditions together, the symptoms can become more difficult to manage. This is why getting the right diagnosis from a mental health professional is very important.

The good news is that both conditions respond well to evidence-based care. Therapy, medication (if needed) and ongoing support can help people feel better and improve their quality of life. Getting help early can also make treatment more effective and support long-term recovery.

Written & Medically Reviewed By

Dr. Amar Shinde

Dr. Amar Shinde, founder of Jagruti Rehab, is a renowned psychiatrist in India with over two decades of experience in mental health, addiction recovery, and neuropsychiatry, dedicated to holistic, compassionate patient care.

Read full profile →

References

Last Updated: 11 Jul 2026

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[1] American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. Fifth Edition, Text Revision (DSM-5-TR). American Psychiatric Association Publishing; 2022. Available at: https://www.psychiatry.org/psychiatrists/practice/dsm/about-dsm

[2] National Institute of Mental Health (NIMH). Depression. Available at: https://www.nimh.nih.gov/health/topics/depression

[3] Sharma E, Sharma LP, et al. Comorbidities in Obsessive-Compulsive Disorder Across the Lifespan. Frontiers in Psychiatry. Available at: https://www.frontiersin.org/articles/10.3389/fpsyt.2021.703701/full

[4] National Institute of Mental Health (NIMH). Obsessive-Compulsive Disorder. Available at: https://www.nimh.nih.gov/health/topics/obsessive-compulsive-disorder-ocd