How long does it take for contrast agent allergy to appear?

In many medical examinations, many patients will feel uncomfortable after the examination, which is the allergic symptom. In particular, contrast agent skin allergy is also a common condition in clinical medicine. However, the degree of skin allergy caused by systemic influence varies in severity. So how long does it take for contrast agent skin allergy to disappear?

First of all, it depends on the degree of skin allergy reaction to contrast agent, but generally treatment measures are required, and it cannot heal itself without treatment. Patients with moderate to severe symptoms may experience headache, dizziness, nausea and retching. There will also be facial rashes, sneezing and runny noses, and breathing difficulties.

Secondly, moderate to severe patients will experience risk reactions such as shock, weak pulse, pale complexion, and a sudden drop in body temperature. If this happens, the inspection must be stopped immediately and emergency rescue work must be carried out. While providing first aid, you should also pay close attention to the patient's body temperature, pulse rate, breathing, blood pressure and other conditions. It is not recommended to move the patient if he is not out of danger.

It is not uncommon for contrast agent allergy to occur due to physical fitness, but a subcutaneous tissue test should be done before the examination. Generally, patients with skin allergies will show it immediately and the doctor will stop the examination. However, there are cases where patients do not have excessive reactions during the test, but feel unwell during the examination process, which requires emergency treatment to avoid life-threatening.