Cephalosporin allergy can be recovered on its own in 2-3 days after stopping the medication in milder cases, while those with severe allergy cannot recover on their own and need to seek medical attention in time. Cephalosporin is a widely used antibiotic with bactericidal efficacy, and some patients may have allergic reactions, usually manifested as rash, urticaria, erythema with itching, occasionally drug fever, polymorphic erythema, interstitial nephritis, epidermal exfoliative dermatitis, etc. If the allergy symptoms are mild, the medication should be stopped and more water should be drunk to promote the excretion of allergy-causing drugs, which usually recover on their own in 2-3 days; if the allergy is severe, with symptoms such as drop in blood pressure, shortness of breath, wheezing and difficulty in breathing, they cannot recover on their own and need to stop using the medication immediately, seek medical attention promptly, resuscitate immediately and use ventilator therapy if necessary. In addition, patients should also do drug allergy test before using cephalosporin antibiotics, and those who are allergic to cephalosporins or have a history of allergy are prohibited.