It is important to do exercise and eat healthy foods in order to fight obesity. People try many things and treatments for weight loss. It is not easy for an obese person to lose weight. It is a long battle that needs a lot of effort and determination. Many people become successful in losing weight with careful planning and right medical advice. However, some people suffer from side effects in the effort of losing too much weight. Extreme weight loss is not good for health. It causes many types of physical and psychological problems. Following are the 4 weird side effects of extreme weight loss.