It's not uncommon for some people to experience irritation, including itching, after using lash serums. These products often contain active ingredients that promote lash growth, but they can also cause reactions in some individuals, especially if they have sensitive skin or are allergic to certain components.
If you experience mild itching but no other concerning symptoms (like redness, swelling, or irritation), you might just be experiencing a typical reaction. However, if the itching persists, worsens, or is accompanied by other symptoms, it's important to discontinue use and consult a healthcare professional or dermatologist. They can help determine if you're having an adverse reaction and suggest alternative options for lash enhancement. Always perform a patch test when trying new products to minimize the risk of irritation.