Medical compression stockings, also known as sequential decompression stockings. The main principle is that the pressure decreases from the lower to the upper pressure gradient, establishing the highest support pressure at the ankle, and then gradually decreasing up the leg. In the calf belly, the pressure is reduced to 70%-90% of the maximum pressure value, and in the thigh, it is reduced to 25%-45% of the maximum pressure value. This decreasing change in pressure allows blood to flow back into the veins of the lower extremities, effectively relieving or improving the pressure on the veins and valves of the lower extremities. Choose the reasonable elastic stockings mainly refer to three aspects: 1, choose the appropriate elastic stockings pressure: elastic stockings are divided into the following levels of pressure A low-pressure preventive health care type (15-20mmHg): applicable to varicose veins, thrombosis high incidence of health care prevention; A medium pressure initial treatment type (20-30mmHg): applicable to varicose veins in the early stage of patients; Second high-pressure moderate treatment type (30-40mmHg): applicable to varicose veins. 40mmHg): for patients who already have obvious varicose veins in the lower extremities (veins protruding from the skin surface when standing) with leg discomfort (such as soreness and swelling of the lower extremities, eczema and itching, cramps and numbness, pigmentation, etc.), phlebitis, severe varicose veins during pregnancy, patients after varicose vein surgery (saphenous vein stripping), patients with post-deep vein thrombosis syndrome; tertiary high pressure Heavy treatment type (40-50 mmHg): for patients with high swelling, ulcers, darkened and hardened skin of lower limbs, high lymphedema, recovery period after plastic liposuction, etc. 2.Choose the length of elastic stockings according to the lesion: medium stockings (below the knee), long stockings (and thigh), pantyhose (and waist) If the wearer only has varicose veins below the knee, it is enough to wear medium elastic stockings; if the wearer also has symptoms above the knee, it is necessary to wear long or pantyhose type elastic stockings. It is not enough to rely on the above two aspects alone, because everyone’s legs are thick and thin, so the third aspect should be determined is the model of the elastic stockings (elastic stockings are divided into small S, medium M, large L, XL) to measure the three main sizes (cm) of the wearer’s legs: the circumference of the ankle (the thinnest part of the foot neck), the maximum circumference of the calf belly and the maximum circumference of the thigh to determine the right number. Buy pantyhose to choose the number according to the height and weight of the wearer. Often people ask me why I bought the elastic socks are not comfortable, strangled panic, I want to explain here, the comfort of elastic socks depends mainly on the pressure and the size of the model, different brands in the same pressure and the same model basically no difference, of course, it should be noted that domestic and imported in the comfort of the material will still be a little different.