Local swelling and pain: after injection of hyaluronic acid, local swelling and pain may appear at the injection site, which usually disappears after a few days.

Congestion and hematoma: subcutaneous blood vessels may be damaged during injection, resulting in congestion and hematoma.

Skin necrosis: if the injection amount is too much or the injection position is too deep, it may lead to skin necrosis.

Skin relaxation: With the increase of age and the aging of the skin, the skin at the injection site may become relaxed.

Allergic reaction: people who are allergic to hyaluronic acid or its components may cause allergic reaction after injection.

Infection: If the injection process is not strictly disinfected, it may lead to infection.

Skin sclerosis: Long-term injection of hyaluronic acid may cause skin sclerosis.

Stiff expression: Overinjection or inaccurate position may lead to stiff expression.

Rough skin: Long-term injection may cause rough skin.

Scar formation: If the injection site has a scar constitution, long-term injection may lead to scar formation.

Therefore, playing hyaluronic acid on the face for a long time may have some sequelae, and it is recommended to use it in moderation under the guidance of a doctor. At the same time, you should know your skin and needs before injection, and choose regular medical institutions and experienced doctors for injection. Care should be taken after injection to avoid direct sunlight, massage and strenuous exercise, so as not to damage the injection site. If you have any discomfort or questions, you should consult a doctor or professional advice in time.