If the allergy is mild, it may disappear on its own in a couple of days. However, if the allergy symptoms are more serious, it is necessary to apply medication for treatment in time. Hysterin belongs to the peptide hormone uterine contraction drugs, can stimulate the uterine smooth muscle contraction, in the clinic is mainly used to treat uterine bleeding caused by uterine contraction weakness after induced labor, birth and abortion. Injections of uterine contractions may have adverse reactions, such as arrhythmia, rapid heart rate, headache and so on. Allergic reactions, such as skin rash and anaphylaxis, may occur in allergic individuals after the use of contractions. If there is only a localized rash, and it is determined that it is caused by the allergy to the contraction, and the symptoms are not very obvious, this can be left untreated, and may disappear on its own after two days. If there are obvious skin itching symptoms, you can use anti-allergy drugs under the guidance of the doctor, such as loratadine and so on. If anaphylaxis occurs, it needs to be rescued in time, otherwise it may lead to the patient’s death.