Hi A. Swelling can be quite common after Restylane injections, while the heat you are describing is not so common.Swelling occurs most often in our practice after tear trough injections under the eye and we use a combination of Benadryl, Motrin and gentle icing to get control of it over a 1-3 day period. The heat you are describing could be the result of general inflammation or it could be a response to the lidocaine in the product. Usually this type of reaction would be very mild and is not generally described as being really hot so if this feeling persists, you should contact your injector.For examples of before and after photos for other Los Angeles Restylane injection patients, click the link below.