The cause of fat grains under the eyes may be caused by the exuberant secretion of skin oil or the frequent use of poor-quality skin care products, as well as the influence of diet. 1. Exuberant skin oil secretion: If you have oily skin, it may lead to more skin oil secretion, and if you don’t clean it properly, it may lead to the accumulation of oil in the patient, and thus the formation of fat grains. 2. Poor-quality skin care products: If you often use some eye creams or skin care products that contain high levels of oil, it may affect the normal secretion of the skin, which can also lead to the formation of fat grains. 3. Dietary influences: Dietary influences are mainly caused by eating too much high-fat or greasy food, such as fatty meat and fried food, which can also lead to the skin oil secretion and the formation of fat grains. It is recommended that patients with more fat grains around the eyes pay attention to care, timely hospital consultation when discomfort occurs, assess the condition, and follow the doctor’s instructions for treatment.