Patch testing prior to use is highly advised to see whether any reaction is caused from a certain product.

Patch test for 2 in 1 Eyeliner Adhesive/3 in 1 Love Liner:

Apply the product as directed to a small area (behind the ear) and leave for 24 hours.
If you develop any serve irritation or swelling, rinse off thoroughly with a cleanser.
Cease use and seek medial attention as soon as possible. 

Patch test for iLLscara:

 Apply the product as directed to a small area (behind the ear) and leave for 24 hours.
If you develop any serve irritation or swelling, rinse off thoroughly with a cleanser/cold water.
Cease use and seek medial attention as soon as possible. 

iLuvLash™ is not responsible for any irritation caused.