The cause of pouch has not been fully understood recently. At present, it is believed that the main causes of pouch formation are as follows:

1, orbital septum fascia degeneration;

2. Relaxation of orbicularis oculi muscle;

3, the skin is slack.

The essence of pouch formation is that the normal balance between the fat content in the lower eyelid and the supporting structure of the lower eyelid is destroyed, so restoring the original balance between them is an important link in pouch plastic surgery. It is generally believed that young people's bags under the eyes are related to family inheritance, mainly manifested in the fat in the orbital septum, and generally not accompanied by eyelid support structure and skin relaxation changes; The bags under the eyes of middle-aged and elderly people are often too much fat tissue in the orbit, showing false hernia or bulging, which is related to family inheritance and will get worse with age. Clinically, it is often manifested as drooping and edema of the lower eyelid skin, which is usually bilateral symmetry.

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Second, the classification of bags under the eyes:

1, simple skin relaxation pouch

The main manifestations are simple skin relaxation and increased wrinkles. It is more common in young and middle-aged people, and its prominent feature is that there is no fat deficiency such as fat swelling or skin depression. The main manifestations are skin relaxation, obvious wrinkles and poor elasticity, which are mostly caused by the decline of tissue function in the lower eyelid area or complications after eye pouch removal through internal approach.

2. Simple fat eye bags

More common in young people. Fat swelling, no drooping skin, no drooping and wrinkles in the lower eyelid are mostly caused by congenital or genetic factors.

3, simple orbicularis oculi muscle hypertrophy pouch

The main surface is swelling caused by hypertrophy of orbicularis oculi muscle of lower eyelid, which is more common in young adults. The main manifestation is hypertrophy of orbicularis oculi muscle, with or without skin fat relaxation and protrusion, which is mostly caused by benign hyperplasia and hypertrophy of orbicularis oculi muscle.

4, mixed bags under the eyes

It has the characteristics of prominent orbital diaphragm fat and slack lower eyelid skin, which is the most common, especially for middle-aged and elderly people. Fat swells to varying degrees, skin is slack, wrinkles are obvious, accompanied by deepening nasolacrimal groove, eyelid and buccal groove, nasolabial groove, which are mostly caused by various factors such as decreased skin elasticity, relaxation of orbital diaphragm, decreased function of orbicularis oculi muscle, and relaxation and downward movement of supporting ligament in the middle part of face.

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