Purple capillaries on the thighs may be considered as varicose veins of the lower extremities. Varicose veins of the lower limbs refer to the dysfunction of the venous valves of the superficial veins of the lower limbs, which causes the blood to flow back into the veins. With the stagnation of blood in the veins and the elevation of the pressure in the veins, this can lead to the dilatation, bulging, and tortuosity of the walls of the affected veins in the long run. Early onset of the disease can be manifested as dilation of capillaries, especially spider web-like capillary dilatation, followed by symptoms of soreness and pain when standing for a long time, and in the late stage of development, swelling of the limbs, depressed edema, itching of the skin, dermatitis, hyperpigmentation, and ulcers in the boot area may occur. It has a great impact on life and work. If purple capillaries persist in the thighs or symptoms worsen, it is recommended to go to a regular hospital for examination, clear diagnosis and early treatment.