The swelling, hardening and thickening of the lower leg is caused by lymph or blood stasis in the lower limb due to blocked lymph and blood flow. There are also some heart diseases, such as the insufficiency of the right heart, which will also lead to the reduction of the amount of blood returning to the heart, and the blood will accumulate in the lower limbs. If the two legs show symmetrical swelling, hardening and thickening, it may be caused by kidney disease, hypoproteinemia, or cirrhosis of the liver. If only one leg shows swelling and hardening, it may be caused by thrombosis of deep and shallow veins and compression of the vein. Therefore, in view of the above situation, if there is swelling, stiffening, and thickening of the lower leg, we should go to the hospital in time to test the blood routine, urine routine, renal function, and ultrasound of the lower leg blood vessels and other related examinations, further clarify the causes of swelling, stiffening, and thickening of the lower leg, and carry out relevant treatment.