In general, there are two kinds of obesity: primary obesity and secondary obesity. Primary obesity is often the result of the following factors: excessive food consumption and lack of exercises. Secondary obesity is often caused by hypothyroidism or other medical conditions that affect the nervous system and/or endocrine system. Symptoms associated with obesity can be low energy, shortness of breath, mental fogginess, somnolence, insomnia, excessive sputum or phlegm in the lu