Eyelashes are genetically determined and cannot be lengthened or thickened by applying overnight tea or drinking overnight tea. Overnight tea not only contains a large number of chemicals, but also easy to breed bacteria reproduction, if you use it to apply the eyes, it may cause eye infections, blepharitis, conjunctivitis and other diseases. Overnight tea may also trigger allergic reactions in the eyes, causing redness, itching and increased secretions. Therefore, it is not recommended to promote eyelash growth by applying overnight tea to the eyes or drinking overnight tea, which is ineffective and may jeopardize eye health.