How long does it take for a pediatric drug allergy to heal on its own depends on the severity of the child’s condition and physical quality, and cannot be generalized. Drug allergy is an allergic reaction caused by taking a certain drug, the clinical manifestations of which are rash, itching, etc. The symptoms can be severe enough to cause anaphylaxis. If the rash is not accompanied by other discomfort, and the rash is small, it can be relieved by itself without medication, which takes about 2-3 days. However, some children with more severe drug allergies need anti-allergy medication to heal, which usually takes about 5-10 days. In addition, in case of severe anaphylactic asthma or even anaphylaxis, the child should be sent to the pediatric emergency department for symptomatic support treatment and intravenous glucocorticoids for anti-allergy treatment.