There is a possibility of self-healing from drug allergy, but how long it takes to recover depends on the patient’s specific condition, and cannot be generalized. If the degree of allergy is mild, it can usually resolve on its own 1-2 days after stopping the medication, during which time attention should be paid to drinking more water and urinating more to promote drug metabolism. However, most patients with drug allergy not only show skin rash, but may also induce other symptoms, such as difficulty in breathing, chest tightness and wheezing, or even laryngeal edema, which often progresses rapidly and usually does not heal on its own, requiring immediate medical attention and intravenous infusion of relevant desensitizing drugs. At the same time, the patient’s condition should be closely observed during the treatment process, and any abnormalities need to be treated urgently. Therefore, it is recommended that patients with drug allergies should go to the hospital’s allergic reactions department in a timely manner when a rash appears and be treated by a professional physician to prevent the condition from continuing to be severe and having adverse consequences.