What are the symptoms of allergic reactions?

Infusion allergy may be accompanied by rash, macula, skin itching, local pain, ulcer, nodule, chills, headache, elevated body temperature, nausea, chest distress and other symptoms; in severe cases, it may also lead to blood pressure drop, palpitation, shock and other phenomena. If allergic symptoms occur during infusion, infusion should be stopped in time and anti-allergic drugs should be taken for treatment.