Reticulated red streaks on legs may be caused by varicose veins of lower limbs or obesity for a short period of time. 1. Varicose veins of the lower limbs: If you have to stand for a long time or sit for a long time in daily life, the blood will be stagnated in the veins due to the influence of gravity, which can lead to the damage of venous valves and the occurrence of varicose veins of the lower limbs, which will lead to the appearance of the red, greenish-purple stripes of the lower limbs in the shape of mesh or flexion. 2. Obesity: Obesity triggered by weight gain in a short period of time will lead to expansion of collagen fibers and elastic fibers in the lower layers of the skin, and beyond the self-regulating range of fracture, which can appear in the legs, abdomen, reticulate or stripes of red stripes, which can be transformed into white in the later stage. There are many reasons for the presence of reticular red stripes on the legs, you can observe the changes in the red stripes on your legs, and it is recommended that you seek medical attention in a timely manner so as not to delay your condition.