Anselm kiefer was one of the most prominent neo-expressionists. his work:

L Believe The answer is: dealt directly with the trauma of Germany's past.

Trauma refers to a psychological anxiety that caused by a massively stressful event in the past. Anselm Kiefer's works revolved around controversial issues of the massive guilt that German people have from the things that their predecessor did under nazi's influence.

You can drink laxative, or  do this exercise when you are sitting in the bathroom on the toilet. to relieve  constipation  fast or in about 1 minute, pinch your nose after your usual exhalation. start holding your breath. but do not mouth breath during this just hold your breath.