When the solar plexus chakra is in balance, a person exudes confidence (without being arrogant), feels self-motivated, and has a sense of purpose. When out of balance, someone may suffer from low self-esteem, have trouble making decisions, and have control issues. 
Imbalances of the solar plexus can also manifest in the physical body such as fatigue, overeating, excessive weight around the stomach, and digestive system disorders such as IBS, ulcers, hypoglycemia, and diabetes.