Whether or not redness, swelling, heat, and pain are normal after a hydrafacial injection treatment is determined by the duration as well as the severity of the symptoms. Hydrafacial injection is a kind of invasive skincare treatment of injection, which is a single molecule of hyaluronic acid as the main injectable injected into the dermal layer under the skin, and can also be used in conjunction with the use of botulinum toxin, glutathione, vitamin C injections and other medications according to the condition of the patient’s skin. 1. The symptoms of redness, swelling, heat and pain appear immediately after the injection of hydrafacial injection, if the scope of symptoms is only limited to the injection site, aseptic ice packs can be applied to observe the progress of the symptoms; some patients are accompanied by palpitations, respiratory distress and other symptoms, the first thing to consider is that the injection is allergic to the drug, which needs to be immediately given to the symptomatic anti-allergic medication and quickly transferred to a comprehensive health care institution; 2. 1 to 3 days after the hydrafacial injection treatment, some patients may still have a slight redness, swelling, heat, pain in the face, which is a normal phenomenon, and usually disappears in about 3 days. If the symptoms of redness, swelling, heat and pain do not improve significantly or continue to worsen after 3 days, it is necessary to go to a regular medical institution to clarify whether there is infection or other conditions. After the injection of hydrafacial injection, it is recommended to stay away from water for a day or two, apply local cold compresses, and pay attention to the cleanliness and hygiene of the injection site, which can alleviate the symptoms of redness, swelling, heat, and pain. If these symptoms persist for more than 3 days and the symptoms are more serious, it is recommended to go to the hospital in a timely manner for a follow-up consultation and professional treatment, and do not abuse the medication on your own.