Cosmetic Sensitivity: What Can an At-Home Patch Test Tell You?
An at-home test cannot rule out every reaction or allergy; follow product instructions and seek professional advice when needed.
Redness, itching or irritation after using a product can have different causes. FDA consumer guidance on cosmetic allergens offers general information, but an at-home test is not a medical diagnosis and cannot completely rule out risk.
What is the scope of the official source?
The FDA page on cosmetic allergens is consumer guidance for the United States and explains potential allergens and reactions. It does not state a publication date; the access date is recorded here.
If a reaction occurs
Stop using the new product and keep its packaging and ingredient list. Seek urgent medical care for a severe or spreading reaction, or symptoms affecting the eyes or breathing. For recurring sensitivity, consult a doctor or dermatologist.