Symptoms of phlebitis of the calf in the early stages will be localized redness of the skin, redness and swelling of blood vessels and pain. Widespread inflammation of calf phlebitis can be characterized by significant swelling of the lower extremities, increased skin temperature, and blistering of the skin with blisters. Phlebitis of the calf is caused by phlebitis due to the formation of blood clots within varicose veins. If the inflammation of the veins in the lower legs is mild and limited, it may be characterized only by localized redness of the skin, redness and swelling of the blood vessels, and pain. If the inflammation of the veins in the lower legs is extensive and the infection is more serious, the patient will have obvious swelling of the lower limbs, elevated skin temperature and blisters on the skin. If suffering from the above symptoms, it is recommended that patients go to regular hospitals for timely examination and standardized treatment. Normally, patients can elevate the lower limbs to promote blood return and relieve the local redness, swelling and heat pain.