Blisters after using bruise medicine may be caused by contact with irritating substances or allergens, and the medicine used at this time is mainly anti-allergic drugs. If there is some kind of irritant ingredient in the bruise medicine, it may cause blisters, or the patient may be allergic to some drug ingredients or materials in this medicine, resulting in blisters. Once the blisters are found, it is recommended to stop using the bruise medicine immediately and take an oral anti-allergy medicine such as loratadine (to which the patient is allergic, children under 2 years old. Contraindicated for pregnant and lactating women), etc. to relieve symptoms. Blisters after using bruising medicine, it is recommended to go to the hospital in time, under the guidance of the doctor for standardized treatment, the above drugs should not be taken on their own to avoid adverse reactions.