If eye swelling occurs, the causes are as follows: 1. If the eye is swollen unilaterally, it is necessary to exclude localized lesions, such as ophthalmic lesions, mosquito bites, skin allergies, which are commonly found in drug allergies, cosmetic allergies or trauma. If the cause is found, it is easy to make the eye swelling subside; 2, if it is bilateral eye edema, you need to distinguish between local or systemic lesions. Localized lesions are commonly associated with superior vena cava obstruction, which requires appropriate imaging to relieve the cause of the obstruction in order to make the ocular edema disappear. Systemic edema is commonly associated with renal, hepatic, and cardiac pathologies. Kidney disease is often associated with bilateral edema of the lower extremities and increased foam in the urine, which can be treated to make the ocular edema disappear. Cardiac lesions are often associated with symptoms of heart failure, such as inability to lie down at night, arrhythmias, or palpitations after activity, and the swelling disappears only if the cardiac lesions are treated aggressively. Other systemic pathologies have their own more characteristic manifestations and require an active search for the cause in order to make a differential diagnosis that will help to eliminate the edema.