Side effects such as pain, bleeding spots, ecchymosis, and hyperpigmentation may occur with hydrafacial injections, and there may also be hazards such as facial nerve damage and allergies. 1. Side effects: People who do hydrafacial injection may experience side effects such as pain, bleeding spots, ecchymosis, and infection in the injected area. If you inject hydrafacial injection for a long time, you may also have symptoms such as skin sensitivity, fragility and red blood. 2. Hazards: If the care after hydrafacial injection is not proper, pigmentation, infection and other hazards will occur. Some people who are allergic to the ingredients of hydrafacial injection may also have allergic reactions such as erythema, blisters and rashes. If you need to do water light injection, it is recommended to go to a regular hospital, and follow the doctor’s instructions for post-treatment scientific care, so as not to cause adverse consequences.