Can Latisse cause stys on your eyelid?

No, Latisse should not cause styes on the the eyelid. If it persists, I recommend following up with your Doctor. Keep in mind, eventually Latisse results may plateau. A combination approach is needed. In combination with Latisse, I typically inject and apply topically PRP for a few treatments at the beginning to improve the growth rate of the lashes. Take viviscal as well. See an expert for a formal evaluation. Best, Dr. Emer

Latisse does not cause styes as the solution is sterile. However, you should make sure that you are only using the provided applicators once -- reusing them can introduce bacteria to your lash line thus causing a stye.

Styes are caused by bacteria that gets into and irritates the oil glands of the eyelids. I would make sure to cleanse the skin prior to applying the solution. Latisse comes with  applicators that are to be used for  applying the solution. The label should indicate that the applicators are for one time use only. I hope that I have answered your question. I recommend following up with a Dr. to ensure you are not having a reaction to the product.