Phlebitis is a sterile inflammation of veins, which can be categorized into superficial phlebitis and deep phlebitis depending on the site of the lesion. Its causes include obesity, prolonged bed rest, operation damage to the veins, drug stimulation, varicose veins and other factors related to it, etc. Patients may experience localized pain, swelling and other symptoms, and after standardized treatment, the prognosis for patients is better. Clinically common phlebitis refers to superficial phlebitis, which can occur in the veins on the surface of the body. Patients may experience pain in the area along the vein’s course, accompanied by striae or nodules, and localized erythema. If phlebitis is combined with skin ulcers and lymphatic infections, the patient may be prescribed oral antibiotic medications such as azithromycin and ceftriaxone sodium, or subcutaneous injections of anticoagulant medications such as low molecular heparin, and pain medications such as ibuprofen and celecoxib may be given orally for some of the pain. If necessary, treatment measures such as saphenous vein stripping and saphenofemoral vein conjunction ligation can be taken, and most of the patients have a better prognosis. Once the diagnosis of phlebitis is confirmed, it is recommended that the patient actively cooperate with the doctor to take relevant therapeutic measures, so as to avoid delaying the condition.