Why Does Erythema and Skin Warmth Happen After Restylane Injection

There is one more possibility that no one has mentioned.  It all depends if your surgeon used Restylane® Lidocaine.  The lidocaine itself may cause a slight vasodilation of the blood vessels and cause the erythema and mild increase in temperature in the local area.   I have seen it in patients with very fair complexions and it occurs within 5 minutes of injection and should fade over 2-3 hours.  As mentioned abouve trauma, allergic reactions and even infections are possibilities so please see your surgeon.
 

You should not really get any erythema or warmth from injection of filler to your face unless you are having a reaction to it.  You should probably check with your doctor.