Swollen eyes after eyelash extensions can be caused by conjunctivitis, folliculitis, allergies and other diseases, patients should seek medical attention in time, after clarifying the cause of the disease to carry out appropriate treatment. 1. Conjunctivitis: eyelash extensions in the process of cleaning is not done, it will lead to microbial infections caused by conjunctivitis, the patient will have swollen eyes, redness of the whites of the eyes, tearing and other symptoms, can be used under the guidance of the doctor erythromycin and other treatment. 2. Folliculitis: eyelash extensions may also cause folliculitis, patients will have eyelid swelling, redness, pain, should pay attention to keep the local clean. 3. Allergy: swollen eyes after eyelash extensions may also be caused by the patient’s allergy to the glue, false eyelashes, the patient will also have localized itching, rashes, if necessary, need to remove the false eyelashes and medication. Swollen eyes after eyelashes, it is recommended that timely medical examination and treatment to avoid adverse consequences.