In Chi…nese medicine, the Gallbladder is a Yang organ and the Liver is its Yin organ partner and they work together, supporting and balancing each other. The Gallbladder stores and excretes bile, governs decision making and planning, controls the sinews and effects dreams. On a deeper emotional level, the Gallbladder is responsible for passion for life, inspiration, action and assertiveness. When digestion is smooth, so is the Liver Qi. The Gallbladder also needs the Liver Qi to be able to release its bile smoothly. If this relationship is impaired, it can adversely affect digestion and cause problems like vomiting, regurgitation, belching and hiccups, which are all symptoms of liver Qi stagnation. It is common in the modern age to see many patients who have had their Gallbladders removed because of gall stones and other problems.
So, why do so many people have problems with their Gallbladders? I believe that stress and inappropriate eating habit are two main reasons. If you are experiencing unusual levels of stress because of things going on in your life (a traumatic event, death, an illness, breakup of a relationship), or stress at work, and/or are eating badly (lots of greasy, fatty, rich or spicy foods), then eventually, the Liver/Gallbladder will become impaired and can cause an excess of anger which can manifest in symptoms like red face & eyes, irritability, angry outbursts, ringing in the ears (tinnitus), and migraines. These are symptoms of Liver Fire (excess heat in the Liver) and gallbladder damp heat.
Source: http://patch.com/georgia/peachtreecorners/what-happened-after-the-gallbladder-removal