Leg capillary purple belongs to the performance of capillary expansion, may be related to the lower extremity venous reflux is not smooth, in addition may also be related to smoking, diabetes and other factors. 1. Poor venous return in the lower limbs: purple leg capillaries may also be caused by poor venous return in the lower limbs, which is common in people who stand for a long time, pregnant women and obese people. You can elevate the lower limbs during bed rest, ankle pump exercise, if you can not relieve, be alert to the occurrence of capillary dilatation. 2. Other factors: smoking, diabetes, hypertension, hypercholesterolemia, obesity and phlebitis, etc., may cause long-term pressure rise in the veins, resulting in purple leg capillaries. The purple color of the leg capillaries can be caused by many factors, and if it cannot be relieved for a long time, or accompanied by abnormal discomfort, it is necessary to consult a doctor in time.