How to Perform a Patch Test Correctly?

At Bencao Herbalist, our commitment lies in incorporating the finest and most distinctive natural ingredients into our bath and body products.


When browsing websites for skincare and cosmetic products, you often come across disclaimers advising a patch test for uncertain sensitivities. But how exactly should you conduct a proper patch test? This blog post will guide you through it. Even with natural products, allergies can still occur. Allergies may stem from various sources, including natural elements like pollen or synthetic materials such as certain plastics. Before using a new skincare item, it is crucial to perform a patch test to ensure no allergic reactions. What does a patch test entail? How can you execute it correctly? Let's delve into these details.


A patch test is an easy method to determine if your skin will have a reaction to new products like cosmetics, soaps, moisturizers, or topical medications. This test is commonly used to identify different types of allergies.



Testing a product before using it is crucial to prevent allergic reactions. Allergies can range from minor redness to severe swelling or more serious effects. Patch testing is essential to ensure the safety of introducing a new skincare product to your routine.


Patch testing is straightforward. Remember to dedicate a day to conduct the patch test correctly. Follow the steps outlined below.

  1. Choose a Clear Patch of Skin:
    • Select a visible and unobstructed area of skin to test the product. It should be a spot where you can leave the product undisturbed for up to 24 hours. The inner elbow region is a suitable example of such an area.
  2. Cleanse the Area Beforehand:
    • Before applying the product, thoroughly wash and sanitize the chosen area. This step is crucial to ensure that any reaction observed is solely from the new product and not influenced by external factors.
  3. Apply a Small Quantity of the Product:
    • Put a small amount of the product on the designated patch of skin and cover it with a bandage.
  4. Allow 24 Hours:
    • Allow a full day to pass before removing the bandage. However, if you feel any discomfort such as pain, burning, or itching, remove the bandage immediately and cleanse the affected area.


If you have an allergy to the product, it can be easily noticeable. Initially, when you remove the bandaid, you might observe some pink or red coloring from the bandaid itself, which should diminish shortly. If the redness persists, it could indicate a mild allergy.

If the skin appears red, raised, itchy, or develops a rash, it is probable that you have a severe allergy to the product. If you are uncertain or have experienced severe reactions to skincare products previously, consulting with your doctor or an allergy specialist is advisable.