The causes of greening of human legs include local freezing, trauma, lower extremity venous return obstacle, cavernous hemangioma and so on.
1. Local freezing: local exposure of legs to cold environment can cause local blood circulation obstacles, local skin cold, blue and other symptoms.
2. Trauma: when the leg is hit and other traumatic injury damages the soft tissue, destroys the capillaries, and then inflammatory reaction occurs, which can lead to pain, swelling or reddening of the skin at the place of injury, followed by subcutaneous bruising.
3. Lower extremity venous return obstacle: lower extremity varicose veins, lower extremity venous thrombosis and so on can lead to lower extremity venous return obstacle, and the symptoms such as leg bruising appear.
4. Cavernous hemangioma: cavernous hemangioma occurs in the subcutaneous tissue, which can make the skin blue-purple.
There may be other pathologic factors for the greening of the legs, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.