Clinically there is no medication available to make normal legs thinner, straighter and longer. To make legs thinner, straighter and longer, you can use persistent swimming, practicing yoga, fat suction and surgery. 1. Insist on swimming: Swimming requires the participation of all the muscles of the body, insisting on swimming can exercise the muscles of the hands and feet, burning excess body fat, which will help to make the legs thinner, straighter and longer. 2. Practice yoga: leg yoga plays a role in stretching and stretching muscles, can eliminate leg fat, beautify leg lines. Adhering to leg yoga can also assist in slimming the legs. 3. Fat suction: If the fat on the legs is thick, you can have fat suction under the guidance of a professional doctor. After extracting the excess leg fat, applying elastic bandage for pressure can make the legs thinner, straighter and longer. 4. Surgery: If the legs are rotund, such as O-shaped leg deformity, the legs can be thinned, straightened and lengthened through surgical osteotomy. The improvement of leg thinning, straightening and lengthening through exercise is limited, if the leg shape appears serious abnormality, it is recommended to consult a doctor.