The common clinical causes of thick legs and big buttocks are mainly the following: a. Obesity, mostly seen in patients who eat a lot of greasy food and lack of sufficient exercise, can cause a large amount of fatty tissue accumulation in the legs and buttocks. At this time, patients need to strengthen exercise, such as running, flat support, high leg raising, squatting and other exercises to promote the metabolism of fatty tissue in the buttocks, reduce the intake of greasy food, eat more vegetables, fruits, light diet so as to alleviate the symptoms of thick legs and large buttocks. Second, patients in the process of fitness due to inappropriate exercise can cause the muscles of the buttocks and legs to be overdeveloped and show thick legs and large buttocks. Patients can work out effectively under the guidance of professionals in a step-by-step manner so as to reduce the performance of thick hips and legs. Third, the patient has thick legs and large buttocks due to genetic factors. In this case, the patient can carry out appropriate dietary regimen and strengthen exercise, but the effect of improvement is often poor.