Dear vicbates: There is wide variability in how people recover from surgery. From a recovery point of view, it is still early to make any assumptions regarding whether this is normal, especially without the opportunity for evaluation. It would be best to have your mother check with her plastic surgeon.
It's really not possible to evaluate early postop symptoms from afar: what you describe might be normal, or it might represent other problems. The only way to find out is for her to address these concerns to her surgeon.