Stress triggers the body’s fight-or-flight response. Chronic stress can cause negative health effects on your mood, immune and digestive systems, and cardiovascular health. You’re sitting in traffic, ...

Depression can cause physical changes in your brain. Areas that may decrease in size include the hippocampus, thalamus, amygdala, and prefrontal cortices. This can affect memory, emotion regulation, ...

Seasonal affective disorder, or SAD, is a type of recurrent major depressive disorder in which episodes of depression occur during the same season each year. This condition is sometimes called the ...