Treatment by medications would include antidepressants such as, SSRI (Selective Serotonin Reuptake Inhibitors) which are commonly prescribed for PTSD.

Eye Movement Desensitization and Reprocessing (EDMR) is a therapy that involves recalling trauma while performing guided eye movements. This is believed to help reprocess traumatic memories and reduce emotional intensity.

How it connects- Its one of the most common signs of depression. It's not about being lazy or bored, but rather your brain no longer responding the way it used to.

Neuroscience links Anhedonia to reduced functions in the brains reward pathways, especially the dopamine system. This makes it harder for people with depression to feel engaged or emotionally connected to their surroundings.

How it connects- When your body and mind feel constantly tired it's difficult to stay alert. You may feel yourself zoning out, struggling to follow conversations, or needing to take frequent breaks.

People with depression often say they wake up feeling exhausted or that simple tasks feel like climbing a mountain. This constant fatigue makes it hard to focus for more than a few minutes at a time.

How it connects- Lack of quality sleep directly impacts attention, memory, and decision making. When your brain doesn't get proper rest, its harder to stay focused, manage tasks, or regulate your emotions throughout the day.

Insomnia in depression is more than just restlessness. It's often tied to racing thoughts, anxiety, or waking up in the early morning hours with a sense of dread. This constant sleep disruption makes it difficult to think clearly, reduces mental stamina, and adds to the emotional burden of depression.

Development- Chronic stress hormones found in untreated depression can shrink or impair the brain regions over time. This worsens cognitive function, emotional regulation, and even responsiveness to future treatment.

Why it matters- These neurological changes can make depression more resistant to treatment, increasing the risk of dementia, and impair quality of life long after mood symptoms fade. Early and sustained treatment helps protect brain function and long term mental clarity.

How it relates to depression:
In depression, brain chemicals that control reward and pleasure don’t work right, so activities feel empty or meaningless. This can make people isolate themselves and feel even worse.

People with depression often say they "just don’t care anymore" or "nothing feels fun." This symptom can last for weeks or months and seriously impact daily life.

A clinical interview is a detailed conversation between a healthcare provider and a patient to understand symptoms, history, and impact on daily life. It helps the doctor diagnose depression beyond just checklists.

How it relates to depression:

Doctors use this to explore feelings, behaviors, and other health issues that might cause or worsen depression. It helps make a clear diagnosis and rule out other conditions.

This is often the first step before any tests or questionnaires are used, especially in mental health clinics.

CBT is a type of talk therapy that helps people change negative thought patterns and behaviors that contribute to depression.

How it relates to depression:

Depression often comes with unhelpful thinking, like feeling worthless or hopeless. CBT teaches skills to challenge those thoughts and build healthier ways to cope.

CBT is proven effective and often recommended as a first treatment. It can be done one-on-one, in groups, or even online.

Depression can strain or damage relationships with family, friends, or partners because it makes it harder to communicate and connect.

How it relates to depression:

Over time, untreated depression can lead to isolation, misunderstandings, and conflicts. People might pull away or feel unsupported.

Strong relationships are important for recovery and well-being. When these break down, depression can worsen and recovery becomes harder.

• Exposure to Trauma:

  The person must have been exposed to actual or threatened to death, serious injury, or sexual violence, either directly, as a witness, or through learning about the trauma of a close family member or friend.

• At least 1 Intrusion symptom: Recurrent, involuntary, and distressing memory of the event from nightmares, flashbacks, or emotional or physical distress, when reminded of the trauma.

• At least 1 Avoidance symptom: Avoiding memories, thoughts, or feelings related to the trauma. Or avoiding places, people, or activities that are reminders.

• At least 2 Negative Changes in Thoughts and Moods:

  Feeling numb, guilty, or detached. Blaming self or others for the trauma. Persistent negative beliefs about self, others, or the world.

• At least 2 Changes in Arousal and Reactivity:

  Irritability or angry outbursts, reckless or self- destructive behavior, hyper vigilance, and even sleep problems or difficulty concentrating.

• Duration:

  Symptoms must last more than one month.

• Distress or Impairment:

  Symptoms must cause significant distress or impairment in social, occupational, or other important areas of life.

Social anxiety involves intense, fear of being judged, rejected, or embarrassed in social situations. This pertains to depression because social anxiety can lead to avoidance of interactions, which overlap with depressive withdrawal. People with depression, feeling insecure, inadequate, or fear, criticism, especially in social settings.

Clinical fact: Studies show that social anxiety disorder, and a major depression often co-occur.