Patch testing a new product on a small area of skin can show a reaction before you use it on your face or whole head.
How
- Follow any patch test instructions on the label, especially for hair dye
- Otherwise, apply a little to a small area, such as the inner arm
- Wait and watch for redness, itching or swelling
- If you react, don't use it, and keep the label
General information, not medical advice. If you have a severe reaction, seek medical care right away. Thrift Bloom isn't paid by any brand, store or salon.