Swollen eyes caused by lychee allergy can be treated with general treatment and medication to improve the symptoms and eliminate the swelling, and the treatment needs to be carried out in consultation with a professional doctor. 1. General treatment: first of all, you need to stop contacting and eating lychee that causes allergy, avoid excessive touching of swollen eyes, quit smoking and drinking, eat a light diet, get enough rest, and exercise appropriately. 2. Medication: If necessary, you need to take anti-allergy drugs, such as loratadine, benadryl and other drugs to improve the symptoms. Due to individual differences, the drugs need to strictly follow the doctor’s instructions for standardized use, there are adverse reactions such as diarrhea, vomiting, etc. need to seek medical treatment, drug allergy is prohibited.