What is the recommended location for performing a patch test when applying eyelash extensions?

The recommended location for performing a patch test when applying eyelash extensions is the outermost lashes or behind the ear. This approach helps ensure that the client does not experience an adverse reaction to the adhesive used in eyelash extensions, as these areas represent a real application site. In addition, testing on the outermost lashes allows for observation of any potential reactions in a way that can be closely monitored and easily assessed during a follow-up appointment.

Testing behind the ear is particularly beneficial because this area is sensitive yet discreet, allowing for a clear assessment of how the skin reacts to the materials without causing discomfort to the client. The skin behind the ear typically has a similar texture and sensitivity to the eyelids, which makes it a suitable location for determining compatibility with the products used.

Other locations, such as the inner eyelid or areas like the cheekbone or forehead, would not provide accurate indicators of how the eyelash extension products will behave during the actual application near the eyes, increasing the risk of a reaction without the opportunity for immediate assessment. Therefore, opting for the outermost lashes or behind the ear is best practice for ensuring the client's safety and comfort.