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Mood Swings vs. a Mood Disorder — And What IOP Does About It

Published July 20, 2026 · 8 min read
Tracy Sibley, PMHNP-BC, APRN

Tracy Sibley, PMHNP-BC, APRN

Board-Certified Psychiatric Mental Health Nurse Practitioner

Tracy Sibley, PMHNP-BC APRN, is a board-certified psychiatric mental health nurse practitioner with Hopewell Health Solutions, located in Glastonbury and West Hartford, Connecticut.

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Mood swings are natural: a sudden event, hormonal shifts, or not sleeping well can mean that you feel OK one minute, and then angry the next. While mood swings are common and can mostly be helped with lifestyle changes, they have symptoms that overlap with mood disorders. A mood disorder, however, is a long-lasting mental health condition that can disrupt your ability to function in everyday life. Mood disorders require structured treatment to be safely managed. An Intensive Outpatient Program (IOP) is a type of care that offers evidence-based therapies, medication management, and the flexibility to live at home while undergoing treatment. Read on to learn about the differences between mood swings and a mood disorder, and how an IOP is an effective option to live calmly and more consistently.

Mood Swings vs a Mood Disorder: Explained

What Are Mood Swings?

A mood swing is defined as a sudden change in how you feel. It happens because neurotransmitter levels in your brain rise or fall. Sometimes you may know what triggered the mood swing, e.g., being hungry, and other times you may not. Mood swings are normal, but they aren't always predictable. Some of the most common reasons for mood swings are:

  • Going through puberty
  • Menstruation
  • Being sleep-deprived
  • Taking certain medications
  • Having a substance use disorder (SUD)

Mental health conditions also influence the likelihood of having mood swings. Research shows that mood instability was reported in 40-60% of people with depression, anxiety disorders, post-traumatic stress disorder, and OCD [1].

Shifts in mood are part of life, and most mood swings don't require treatment, but there are recommended ways to reduce the frequency and intensity of them. These include:

  • Exercising regularly
  • Eating well (fewer sugars and processed foods)
  • Spending time outdoors or in nature
  • Practicing mindfulness and meditation

If you start to experience mood swings more often, more strongly, and notice that they impact your relationships and daily routine, you should seek medical care. These signs may suggest a deeper issue to address, such as a mood disorder.

What Is a Mood Disorder?

A mood disorder is a mental health disorder that's characterized by long periods of extreme emotions such as sadness, happiness, or anger. Changes in mood can last for weeks and lead to changes in your behavior that make daily activities such as working or studying very difficult. Around 9.7% of U.S. adults have a mood disorder [2]. The most common mood disorders include:

  • Depression
  • Bipolar disorder
  • Premenstrual dysphoric disorder
  • Disruptive mood dysregulation disorder

Mood disorders can affect anyone, but they are most prevalent among children and adolescents, where around 15% suffer from a mood disorder [3]. Anxiety disorder is not a mood disorder but is common among people with a mood disorder, and has been associated as a predictor of developing a mood disorder [4] [5].

Symptoms of a mood disorder include:

  • Feeling sad and hopeless most days
  • Fatigue, low energy, and mood
  • Inability to experience pleasure
  • Suicidal thoughts
  • Problems focusing
  • Oversleeping or sleeping too little
  • Loss of appetite
  • Manic episodes (a period of extreme, elevated mood, often present with bipolar disorder)

Biological, genetic, and environmental factors can increase the likelihood of having a mood disorder. People with major depressive disorder and bipolar disorder have been found to have increased activity or enlarged volume in the amygdala compared to healthy individuals [6]. Mood disorders share several genetic associations, meaning they are highly heritable [7]. Trauma and stress are both linked to mood disorders [8].

Treatment for mood disorders is effective and accessible, and combines psychotherapy such as Cognitive Behavioral Therapy (CBT) and Dialectical Behavioral Therapy (DBT), with medication such as antidepressants and mood stabilizers. The exact structure and elements of treatment vary depending on the mood disorder and symptoms.

What Is an IOP?

An IOP is a structured type of care that treats mental health conditions including mood disorders. Unlike residential care, you attend treatment during the day but return home in the evening. Most IOPs run throughout the week and offer sessions for a few hours per day.

At Hopewell Health Solutions, our IOP runs Monday-Thursday for 8-12 weeks. We have different options for you to choose morning or evening sessions. We also tailor our IOPs for women, teens, tweens, and adults with co-occurring disorders.

Studies highlight that IOPs not only help reduce mental health symptoms from intake, but also have a high retention rate [9].

IOP For Mood Disorders

Having a mood disorder doesn't necessarily mean that you can't live independently. If you're able (and prefer) to live at home while undergoing care, an IOP makes sense. It also supports people who have commitments such as family, work, or school.

One of the biggest advantages of IOP is that you can integrate what you learn from treatment directly into your daily life in real time, so you can see the results of better emotion regulation, communication, and a more stable mood.

An IOP for mood disorders uses evidence-based therapies to guide you to recognize and reframe unhealthy emotions and behaviors. These therapies are led by a trained professional, and include:

  • CBT to help challenge your negative thought patterns and develop lifelong coping strategies to manage your mood disorder.
  • DBT to help you manage intense emotions, reduce stress, tolerate distress, and set boundaries in your relationships.
  • Transcranial magnetic stimulation (TMS) to restore healthy brain activity if you have a treatment-resistant mood disorder such as depression. Treatment is non-invasive and uses electromagnetic pulses to stimulate the area of your brain responsible for mood regulation.

IOPs also offer medication management, which involves monitoring your medication, altering your doses if needed, and recommending other medications where appropriate.

Wellness activities are part of IOPs, too. Yoga, meditation, hiking, and mindfulness practices can complement your clinical care, and ensure that both your mind and body are healthy.

Start Healing at Hopewell Health Solutions, Connecticut

A mood disorder doesn't have to define you. We have a tween IOP (for ages 8-12), a teen IOP (for ages 13-17), and an adult IOP to help anyone suffering from a mood disorder. All our care is tailored to each person and age group, taking into account your medical history, current situation, and future plans.

We have a team of licensed clinicians who provide evidence-based therapies and medication management, and strive to always prioritize your comfort and progress. We also have different mindfulness practices to nurture your physical and mental well-being, and keep you engaged with treatment for longer-lasting outcomes.

Our centers are based across Connecticut in Glastonbury, West Hartford, East Hampton, and Westbrook.

There's always hope to heal. Speak with our admissions team.

Sources

  1. [1] Broome, M. et al. (October 2015). Mood instability: significance, definition and measurement. British Journal of Psychiatry.
  2. [2] National Institute of Mental Health. Any Mood Disorder. nimh.nih.gov.
  3. [3] Merikangas, K. et al. (October 2010). Lifetime prevalence of mental disorders in U.S. adolescents: results from the National Comorbidity Survey Replication--Adolescent Supplement (NCS-A). Journal of the American Academy of Child & Adolescent Psychiatry.
  4. [4] Kwon, S. et al. (December 2025). Understanding Anxiety Symptoms of Mood Disorders Across Bipolar and Major Depressive Disorder Using Network Analysis. Medicina (Kaunas).
  5. [5] Roza, S. et al. (December 2003). Stable Prediction of Mood and Anxiety Disorders Based on Behavioral and Emotional Problems in Childhood: A 14-Year Follow-Up During Childhood, Adolescence, and Young Adulthood. American Journal of Psychiatry.
  6. [6] Li, B. et al. (August 2025). Amygdala volume abnormalities and cognitive impairment in major depressive disorder and bipolar disorder II. BMC Psychiatry.
  7. [7] Coleman, JRI, et al. (2020). The Genetics of the Mood Disorder Spectrum: Genome-wide Association Analyses of More Than 185,000 Cases and 439,000 Controls. Biological Psychiatry.
  8. [8] Jelaga, D. et al. (August 2025). The Role of Stress and Trauma in the Onset of Mood Disorders. European Psychiatry.
  9. [9] Watkins, L. et al. (August 2023). Clinical Effectiveness of an Intensive Outpatient Program for Integrated Treatment of Comorbid Substance Abuse and Mental Health Disorders. Cognitive and Behavioral Practice.
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Written by

Tracy Sibley, PMHNP-BC, APRN

Tracy Sibley, PMHNP-BC, APRN

Board-Certified Psychiatric Mental Health Nurse Practitioner

Tracy Sibley, PMHNP-BC APRN, is a board-certified psychiatric mental health nurse practitioner with Hopewell Health Solutions, located in Glastonbury and West Hartford, Connecticut.

Read Full Bio →

Medically reviewed by Kristine Schlichting, PhD, Director & Founder.

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