The squeaky sound when the corner of the eye is pressed may be a normal physiological phenomenon caused by a small amount of air in the conjunctival sac, or it may be caused by a small amount of gas in the lacrimal sac, or it may be a symptom caused by trauma leading to subcutaneous emphysema. 1. A small amount of air in the conjunctival sac: the conjunctival sac is a potential sac-like cavity formed by the lid conjunctiva, the bulbar conjunctiva and the fornix conjunctiva, and this cavity is connected to the outside world through the lid fissure, so a small amount of air is a completely normal phenomenon. When the corner of the eye is pressed, the small bubbles formed by the local air and the tear fluid produce relative movement, which will make a squeaking sound. 2. A small amount of air in the lacrimal sac: the lacrimal sac is connected to the lacrimal duct and the tear duct, and the nasolacrimal duct, so there can be a small amount of gas, when the corner of the eye is pressed, the local liquid is pressurized to flow, which makes the gas in the lacrimal sac also move, and a squeaky sound can appear. 3. Subcutaneous emphysema: eye trauma can lead to sieve sinus gas into the eyelid subcutaneous, may also be gas-producing bacterial infections leading to subcutaneous emphysema, due to the presence of subcutaneous gas, press the corner of the eye will also appear squeaky sound. It is recommended that children who experience squeaking when pressing on the corners of the eyes and who are experiencing other discomforts should be seen promptly for evaluation of their condition and treatment as prescribed by the physician.