The swelling of large bags at the arms of vaccine recipients after vaccination can be caused by a variety of reasons, such as vaccine stimulation, coupling reaction, food stimulation, local infection, etc., and can be treated accordingly according to the specific causes to promote the reduction of large bags at the arms as soon as possible. Common causes and treatment methods 1. vaccine stimulation: after vaccination, local blood vessels are stimulated by drugs, vascular permeability increases, vascular exudation increases, and swollen bags and hard lumps appear, or local malabsorption after vaccination, at which time the recipient can promote absorption and relieve symptoms by applying hot compresses with clean towels; 2. coincidental reaction: that is, the recipient has scars, inflammatory hard nodules, and In fact, it is not related to the vaccine and is not an adverse reaction, so the vaccinees need not worry too much and usually do not need special treatment; 3. Food stimulation: after vaccination, the vaccinees ingest seafood such as fish and shrimp, as well as stimulating foods such as coffee, alcoholic beverages, chili pepper and pepper, which may cause the blood vessels at the vaccinated site to dilate and If the vaccine recipient takes a bath and scratches on the day of vaccination, causing secondary infection at the vaccination site, which may result in redness, swelling, hard nodules, fever, swelling and pain, it is recommended that the patient seek medical attention and use topical mupirocin ointment under the guidance of a doctor for local 5. Allergic reactions: if the vaccinees are allergic, local reactions such as redness, swelling, pain and hard nodules at the vaccination site, as well as systemic reactions such as fever, malaise, vomiting and diarrhea may easily occur after vaccination, so the vaccinees should seek medical attention and follow medical advice for anti-allergic treatment with drugs such as terfenadine, cetirizine and loratadine; 6. The pustules will often break down on their own and crust over to form a scar, which is also a sign of successful vaccination. After the vaccination, it is recommended that patients do not take a shower for 1-2 days to prevent infection of the needle eye, and for patients with large swollen bags on their arms, they should seek medical treatment in time to avoid aggravation.