The main effects of phlebitis on the body include localized redness or pigmentation of the skin, itching and swelling of the skin, as well as localized pain. Phlebitis is an aseptic inflammation of the veins, and the common clinical type is thrombosed superficial phlebitis. The main causes of phlebitis are venous injury caused by infusion of fluids, surgery, etc., sedentary lifestyle, and prolonged bed rest. The disease has little effect on the patient’s body, and most patients with mild symptoms usually have no obvious discomfort. Patients with symptoms usually show redness and hyperpigmentation of the skin in the area of the local venous route, and some of the patients may have itching, swelling and other discomforts. At the same time, if the patient has a thrombus in the vein, the patient may experience pain and nodules along the vein travel area. If the patient’s condition is severe and the thrombus becomes dislodged, it may cause a thromboembolism, which can have a significant impact on the patient’s health. Although severe phlebitis may have a greater impact on the patient’s body, most patients are not seriously ill and the condition is self-limiting, with mild cases usually resolving on their own in about 3 or 4 weeks, so there is no need for patients to worry too much.