How to patch test a new product (without waiting a month)

A K-beauty haul is exciting, but opening five new products on the same night makes it impossible to tell which one caused a problem. A simple patch test helps.

A common home method

1. Pick a small, discreet area: behind the ear, the side of the neck or along the jawline
2. Apply a normal amount once or twice a day, the way you'd actually use it
3. Keep going for several days; many people choose about a week for leave-on products
4. Watch for itching, burning, redness or small bumps

Good habits around it

• Introduce one new product at a time, with a gap before the next
• Test leave-on products (serums, creams, sunscreens) more carefully than rinse-offs
• Test actives like acids or retinoids on the face itself later, since the face can react differently

Limits to know

• A clean patch test lowers the risk but doesn't guarantee zero reaction
• Clogged pores can take longer to show than a patch test runs
• A strong reaction, swelling or blistering is a reason to stop and see a doctor or pharmacist

Do you patch test, or do you go straight to the whole face?

#PatchTest #SensitiveSkin #KBeauty