Blood on the thighs may be caused by capillary dilatation diseases, varicose veins of the lower limbs and other causes.
1. Capillary dilatation diseases: such as hereditary hemorrhagic capillary dilatation and other diseases, which are genetically related and characterized by dilatation of capillaries and microvessels in the skin, mucous membranes, and internal organs with hemorrhage. The phenomenon of blood in the legs may occur.
2. Varicose veins of the lower limbs: especially for patients engaged in heavy physical labor, due to prolonged standing or sitting for a long time, the venous return is impaired, which can make the local capillaries congested and dilated, manifested as blood in the legs.
It is recommended that patients with blood in the thighs go to the hospital in time, and be treated by the doctor after a clear diagnosis, so as not to delay the condition.