What Are the Signs of an Allergic Reaction to Hair Dye?

Hair dyes and allergic reactions

Right! An allergic reaction to a drug is also called an allergic reaction, which refers to the adverse reaction of a patient with a specific constitution after using a certain drug. Often manifested as flushing of the skin, itching, palpitations, rashes, and difficulty breathing. In severe cases, shock or death may occur.
So, in life, how to determine the drug allergic reaction?
1. Generally does not occur in the first medication.
2. When the body is in a sensitive state, it can develop within minutes to 24 hours after re-exposure to allergens, and individual cases can be delayed to a few days.
3. After the allergic reaction occurs, the drug is discontinued, and the slight one can be resolved quickly, and the prognosis is good. Failure to treat severely ill patients can lead to death or sequelae.
4. Patients who have been sensitized can continue to have the pathogenicity of the drug for a long time, even for life. Re-use of the drug can reproduce the original symptoms or more serious. The more times the drug is exposed, the more severe the reaction.
5. Drugs with similar structures often have cross- or cross-over allergic reactions.
6. Certain diseases can increase the sensitization of drugs to the body, but after severe illness, trauma or major surgery, allergic reactions to some original drugs will also be reduced or disappeared.
7. The skin allergy reaction of some drugs can be measured, but there are also cases where the skin test results are not consistent with the actual clinical response.
8. Drug allergic reactions are different from the symptoms of the original diseases, such as asthma caused by aspirin, indomethacin, deafness caused by gentamicin and streptomycin, and anaphylactic shock caused by penicillin and iodine preparations.