Inflammation is when chemicals from the body’s white blood cells are released into the blood or affected tissues to protect your body from foreign substances. This release of chemicals increases the blood flow to the area of injury or infection.
Acute inflammation is a normal part of our body’s healing process, this might occur when you get a scratch (example). The skin around the scratch will become engorged with blood and become puss filled while the body repels any invading bacteria.
In contrast to acute inflammation is chronic inflammation. This is long term inflammation that just hangs around, often attacking the body itself making you sick rather than healthy. This could be as a result of allergies, stress, intake of toxic foods, bad environment, lack of vitamins or one of many other lifestyle issues.
Depression has been strongly linked with chronic inflammation.
In order to get past depression, it might be required to work out how to rid yourself of chronic inflammation.
This image from http://www.nutrishield.com/inflammageing/contentp2.php is a good guide on how to treat inflammation.