Hard, non-sunken edematous plaques on the anterior tibia and foot are the diffuse form of anterior tibial mucinous edema: diffuse, hard, non-sunken edematous plaques seen on the anterior tibia and foot. What are the symptoms that are easily confused with it? 1. anterior tibial melanosis Anterior tibial melanosis is one of the complications of diabetes mellitus, with itchy skin, easy boils, and a phenotype called anterior tibial melanosis. A touch of black piece on the leg. It doesn’t go away quickly, and before it goes away, there is another one, and it is black again. The front of the leg is all black. Many people with diabetes have such a performance. 2, pretibial acupressure edema pretibial acupressure edema is one of the clinical manifestations of primary lower limb deep vein valve closure insufficiency, primary lower limb deep vein valve insufficiency (primarydeepvenousinsufficiency) is a new category of venous lesions first proposed by Kistner (1980), mainly due to the free edge of the valve in the deep vein elongation, relaxation, sagging, resulting in the deep vein, It is mainly due to the elongation, relaxation and prolapse of the free edge of the valve in the deep vein, so that when the blood flows backwards under the effect of gravity, the two opposing leaflets cannot be closely aligned in the lumen, thus causing deep venous reflux lesions, resulting in stasis and high pressure in the venous system of the lower limbs, and leading to a series of clinical symptoms and signs. The hard, non-sunken edematous plaques on the anterior tibia and foot are the diffuse form of anterior tibial mucinous edema: diffuse, hard, non-sunken edematous plaques on the anterior tibia and foot. The lesions are most commonly found in the anterior tibial region and may begin on one side and then extend to involve both lower legs externally, with a more or less symmetrical distribution. A few may also be seen on the hands, arms, and face, and occasionally on the trunk. The lesions are round, oblong, or irregularly rounded, swollen, firm, non-depressed plaques with clear borders under pressure. They are waxy, translucent to rose or pale red, sometimes with brown or brownish-black coloration. The surface is uneven. The hairs are also coarse and may be orange peel-like. There is often localized increased sweating and coarse black hair with light. Self-perception may be accompanied by itching or anthroposis.