What types of Depression could be caused by chemical imbalances

Although some research links chemical imbalances in the brain to depression symptoms, scientists argue that this is not the whole picture.

For example, researchers point outTrusted Source that if depression were solely due to chemical imbalances, treatments that target neurotransmitters, such as selective serotonin reuptake inhibitors (SSRIs), should work faster.

The symptoms of depression vary widely among individuals, but they can include:

  • persistent feelings of sadness, hopelessness, anxiety, or apathy
  • persistent feelings of guilt, worthlessness, or pessimism
  • loss of interest in formerly enjoyable activities or hobbies
  • difficulty concentrating, making decisions, or remembering things
  • irritability
  • restlessness or hyperactivity
  • insomnia or sleeping too much
  • changes in appetite and weight
  • physical aches, cramps, or digestive problems
  • thoughts of suicide

It is possible to develop depression at any age, but symptoms usually begin when a person is in their teenage years or early 20s and 30s. Women are more likelyTrusted Source than men to experience depression.

Many different types of depression exist. These include:

The dramatic hormonal changes that take place after giving birth are among the factors that can increase a woman’s risk of developing postpartum depression. According to the National Institute of Mental Health, 10–15% of women experience postpartum depression.

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