Patients who are overly obese may have a slightly smaller head shape than normal due to excessive subcutaneous fat accumulation and a thinner subcutaneous fat layer after weight loss. The change of head shape after weight loss is the change of subcutaneous fat layer. The adult cranial bone development has been perfected, so weight loss will not lead to changes in cranial bone shape, and will not cause the cranial cavity to become smaller, nor will it cause changes in the brain. Excessively obese patients can help improve their health through scientific weight loss. It not only helps to control hypertension, hyperlipidemia and hyperglycemia, but also helps to prevent the occurrence of cardiovascular and cerebrovascular diseases. Scientific weight loss methods mainly include proper exercise, reasonable recipe matching and optimistic and cheerful mindset. Excessive dieting or oral diet pills are not recommended for weight loss, nor is liposuction treatment.