The phases of thromboembolic vasculitis are local ischemia, trophic disorder and tissue necrosis. 1. Local ischemic stage: the patient’s affected limbs are pale in appearance, the skin temperature decreases, and the patient feels sore, swollen and weak. Some patients may have symptoms such as numbness, tingling and burning sensation of the affected limbs, followed by typical intermittent claudication, which is often accompanied by episodes of wandering phlebitis. 2. Nutritional disorders: the patient’s affected limbs will have resting pain, the pain is more obvious at night, and when it is serious, it will also affect the patient’s sleep, the temperature of the skin of the affected limbs will further drop, the color will be pale, and there will be dryness of the skin, desquamation, depilatory, thickening and deformation of the nails, and muscular atrophy and other symptoms. 3. Tissue necrosis stage: the patient’s affected limb toe or finger end will appear black, ulcer, gangrene and other symptoms, necrotic tissue and normal tissue boundaries are obvious, and finally gangrenous limb end will fall off by itself. Patients suffering from thromboembolic vasculitis should have regular checkups and follow the doctor’s instructions for daily treatment.